diff --git a/src/pages/taskmanager/components/task-detail/TaskDetailModal.tsx b/src/pages/taskmanager/components/task-detail/TaskDetailModal.tsx
index 7666da0..1c8a015 100644
--- a/src/pages/taskmanager/components/task-detail/TaskDetailModal.tsx
+++ b/src/pages/taskmanager/components/task-detail/TaskDetailModal.tsx
@@ -209,7 +209,7 @@ const TaskDetailModal: FC<Props> = ({ open, task, columns, projectId, onClose, o
             isSaving={updateTask.isPending}
           />
 
-          <AttachmentList attachments={taskDetail?.attachments} />
+          <AttachmentList taskId={task.id} attachments={taskDetail?.attachments} />
 
           <CheckLists
             taskId={task.id}
diff --git a/src/pages/taskmanager/components/task-detail/attachment/AttachmentItem.tsx b/src/pages/taskmanager/components/task-detail/attachment/AttachmentItem.tsx
index 9a17f6e..a77f1e0 100644
--- a/src/pages/taskmanager/components/task-detail/attachment/AttachmentItem.tsx
+++ b/src/pages/taskmanager/components/task-detail/attachment/AttachmentItem.tsx
@@ -73,13 +73,31 @@ const AttachmentItem: FC<Props> = ({ title, createdAt, type, url, onEdit, onDele
           </PopoverButton>
 
           <PopoverPanel anchor="bottom end" className="z-[80] mt-1 rounded-[10px] bg-white shadow-md text-right p-3">
-            <button type="button" onClick={onEdit} className="w-full text-sm text-right">
-              ویرایش
-            </button>
+            {({ close }) => (
+              <>
+                <button
+                  type="button"
+                  onClick={() => {
+                    onEdit();
+                    close();
+                  }}
+                  className="w-full text-sm text-right"
+                >
+                  ویرایش
+                </button>
 
-            <button type="button" onClick={onDelete} className="w-full mt-3 text-sm text-right text-[#FF0000]">
-              پاک کردن
-            </button>
+                <button
+                  type="button"
+                  onClick={() => {
+                    onDelete();
+                    close();
+                  }}
+                  className="w-full mt-3 text-sm text-right text-[#FF0000]"
+                >
+                  پاک کردن
+                </button>
+              </>
+            )}
           </PopoverPanel>
         </Popover>
       </div>
diff --git a/src/pages/taskmanager/components/task-detail/attachment/List.tsx b/src/pages/taskmanager/components/task-detail/attachment/List.tsx
index 3d69ccb..90cae34 100644
--- a/src/pages/taskmanager/components/task-detail/attachment/List.tsx
+++ b/src/pages/taskmanager/components/task-detail/attachment/List.tsx
@@ -1,15 +1,28 @@
-import { type FC } from "react";
+import { useState, type FC } from "react";
 import { useTranslation } from "react-i18next";
-import AttachmentItem from "./AttachmentItem";
-import type { TaskAttachment } from "./types";
+import DefaulModal from "../../../../../components/DefaulModal";
+import ModalConfrim from "../../../../../components/ModalConfrim";
+import { toast } from "../../../../../components/Toast";
+import { ErrorType } from "../../../../../helpers/types";
+import { useSingleUpload } from "../../../../service/hooks/useServiceData";
+import { useDeleteTaskAttachment, useUpdateTaskAttachment } from "../../../task/hooks/useTaskData";
 import type { TaskAttachmentType } from "../../../task/types/TaskTypes";
+import AttachmentItem from "./AttachmentItem";
+import TaskDetailAttachmentForm from "./TaskDetailAttachmentForm";
+import type { TaskAttachment } from "./types";
 
 type Props = {
+  taskId: string;
   attachments?: TaskAttachmentType[];
 };
 
-const AttachmentList: FC<Props> = ({ attachments = [] }) => {
+const AttachmentList: FC<Props> = ({ taskId, attachments = [] }) => {
   const { t } = useTranslation("global");
+  const singleUpload = useSingleUpload();
+  const updateTaskAttachment = useUpdateTaskAttachment();
+  const deleteTaskAttachment = useDeleteTaskAttachment();
+  const [deleteItemId, setDeleteItemId] = useState<string | null>(null);
+  const [editItem, setEditItem] = useState<TaskAttachment | null>(null);
 
   const mappedAttachments: TaskAttachment[] = attachments.map((item) => ({
     id: item.id,
@@ -22,6 +35,61 @@ const AttachmentList: FC<Props> = ({ attachments = [] }) => {
   const files = mappedAttachments.filter((item) => item.type === "file");
   const links = mappedAttachments.filter((item) => item.type === "link");
 
+  const handleDelete = () => {
+    if (!deleteItemId) return;
+
+    deleteTaskAttachment.mutate(
+      { id: deleteItemId, taskId },
+      {
+        onSuccess: () => {
+          setDeleteItemId(null);
+        },
+        onError: (error: ErrorType) => {
+          toast(error.response?.data?.error.message[0], "error");
+        },
+      },
+    );
+  };
+
+  const handleUpdate = async (data: { file?: File; title: string; linkId: string }) => {
+    if (!editItem) return;
+
+    let fileUrl = data.linkId.trim() || editItem.file || "";
+
+    if (data.file) {
+      const formData = new FormData();
+      formData.append("file", data.file);
+
+      try {
+        const uploadResult = await singleUpload.mutateAsync(formData);
+        fileUrl = uploadResult?.data?.url ?? "";
+      } catch (error) {
+        toast((error as ErrorType).response?.data?.error.message[0], "error");
+        return;
+      }
+    }
+
+    if (!fileUrl) return;
+
+    const title = data.title.trim() || data.file?.name || editItem.title;
+    const type = data.file ? "file" : editItem.type;
+
+    updateTaskAttachment.mutate(
+      { id: editItem.id, params: { file: fileUrl, title, type, taskId } },
+      {
+        onSuccess: () => {
+          setEditItem(null);
+          toast(t("success"), "success");
+        },
+        onError: (error: ErrorType) => {
+          toast(error.response?.data?.error.message[0], "error");
+        },
+      },
+    );
+  };
+
+  const isUpdateSubmitting = singleUpload.isPending || updateTaskAttachment.isPending;
+
   if (mappedAttachments.length === 0) return null;
 
   return (
@@ -40,8 +108,8 @@ const AttachmentList: FC<Props> = ({ attachments = [] }) => {
                 createdAt={item.createdAt}
                 type="file"
                 url={item.file}
-                onEdit={() => {}}
-                onDelete={() => {}}
+                onEdit={() => setEditItem(item)}
+                onDelete={() => setDeleteItemId(item.id)}
               />
             ))}
           </div>
@@ -60,13 +128,38 @@ const AttachmentList: FC<Props> = ({ attachments = [] }) => {
                 createdAt={item.createdAt}
                 type="link"
                 url={item.file}
-                onEdit={() => {}}
-                onDelete={() => {}}
+                onEdit={() => setEditItem(item)}
+                onDelete={() => setDeleteItemId(item.id)}
               />
             ))}
           </div>
         </div>
       )}
+
+      <ModalConfrim
+        isOpen={deleteItemId !== null}
+        close={() => setDeleteItemId(null)}
+        onConfrim={handleDelete}
+        isLoading={deleteTaskAttachment.isPending}
+      />
+
+      <DefaulModal
+        open={editItem !== null}
+        close={() => setEditItem(null)}
+        isHeader
+        title_header={t("edit")}
+        width={420}
+      >
+        {editItem ? (
+          <TaskDetailAttachmentForm
+            initialValues={{ title: editItem.title, fileUrl: editItem.file, type: editItem.type }}
+            onClose={() => setEditItem(null)}
+            onSubmit={handleUpdate}
+            isSubmitting={isUpdateSubmitting}
+            submitLabel={t("save")}
+          />
+        ) : null}
+      </DefaulModal>
     </div>
   );
 };
diff --git a/src/pages/taskmanager/components/task-detail/attachment/TaskDetailAttachmentForm.tsx b/src/pages/taskmanager/components/task-detail/attachment/TaskDetailAttachmentForm.tsx
index cba3e4b..1a28403 100644
--- a/src/pages/taskmanager/components/task-detail/attachment/TaskDetailAttachmentForm.tsx
+++ b/src/pages/taskmanager/components/task-detail/attachment/TaskDetailAttachmentForm.tsx
@@ -4,22 +4,39 @@ import Button from "../../../../../components/Button";
 import Input from "../../../../../components/Input";
 import Select from "../../../../../components/Select";
 
+type InitialValues = {
+  title: string;
+  fileUrl?: string;
+  type: "file" | "link";
+};
+
 type Props = {
   onClose: () => void;
   onSubmit: (data: { file?: File; title: string; linkId: string }) => void;
   isSubmitting?: boolean;
+  initialValues?: InitialValues;
+  submitLabel?: string;
 };
 
-const TaskDetailAttachmentForm: FC<Props> = ({ onClose, onSubmit, isSubmitting = false }) => {
+const TaskDetailAttachmentForm: FC<Props> = ({
+  onClose,
+  onSubmit,
+  isSubmitting = false,
+  initialValues,
+  submitLabel,
+}) => {
   const { t } = useTranslation("global");
   const fileInputRef = useRef<HTMLInputElement>(null);
   const [file, setFile] = useState<File | null>(null);
-  const [title, setTitle] = useState("");
-  const [linkId, setLinkId] = useState("");
+  const [title, setTitle] = useState(initialValues?.title ?? "");
+  const [linkId, setLinkId] = useState(initialValues?.type === "link" ? (initialValues.fileUrl ?? "") : "");
+  const isEdit = Boolean(initialValues);
 
   const linkItems = [{ value: "", label: t("taskmanager.task_detail.none") }];
 
-  const canSubmit = Boolean(file) || Boolean(title.trim());
+  const canSubmit = isEdit
+    ? Boolean(title.trim()) || Boolean(file)
+    : Boolean(file) || Boolean(title.trim());
 
   const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
     const selected = e.target.files?.[0];
@@ -35,6 +52,12 @@ const TaskDetailAttachmentForm: FC<Props> = ({ onClose, onSubmit, isSubmitting =
     });
   };
 
+  const currentFileLabel = file
+    ? file.name
+    : initialValues?.fileUrl
+      ? initialValues.fileUrl
+      : t("no_select_file");
+
   return (
     <div className="flex flex-col gap-3">
       <h3 className="text-xs font-bold text-center">{t("taskmanager.task_detail.attachment")}</h3>
@@ -43,7 +66,7 @@ const TaskDetailAttachmentForm: FC<Props> = ({ onClose, onSubmit, isSubmitting =
         <button type="button" onClick={() => fileInputRef.current?.click()} className="shrink-0 h-6 rounded-lg text-[11px] px-3 bg-secondary">
           {t("select_file")}
         </button>
-        <span className="text-[11px] text-description truncate">{file ? file.name : t("no_select_file")}</span>
+        <span className="text-[11px] text-description truncate">{currentFileLabel}</span>
         <input ref={fileInputRef} type="file" className="hidden" onChange={handleFileChange} />
       </div>
 
@@ -69,7 +92,7 @@ const TaskDetailAttachmentForm: FC<Props> = ({ onClose, onSubmit, isSubmitting =
           {t("cancel")}
         </Button>
         <Button type="button" onClick={handleSubmit} disabled={!canSubmit || isSubmitting} isLoading={isSubmitting} className="h-8 bg-[#292D32] text-white rounded-xl text-xs disabled:opacity-50 w-[95px]">
-          {t("taskmanager.task_detail.insert")}
+          {submitLabel ?? t("taskmanager.task_detail.insert")}
         </Button>
       </div>
     </div>
diff --git a/src/pages/taskmanager/task/hooks/useTaskData.ts b/src/pages/taskmanager/task/hooks/useTaskData.ts
index ec1ef75..636f098 100644
--- a/src/pages/taskmanager/task/hooks/useTaskData.ts
+++ b/src/pages/taskmanager/task/hooks/useTaskData.ts
@@ -7,6 +7,7 @@ import {
   CreateTaskRemarkType,
   CreateTaskType,
   UpdateCheckListItemType,
+  UpdateTaskAttachmentType,
   UpdateTaskType,
 } from "../types/TaskTypes";
 
@@ -169,3 +170,30 @@ export const useCreateTaskAttachment = () => {
     },
   });
 };
+
+export const useUpdateTaskAttachment = () => {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: ({ id, params }: { id: string; params: UpdateTaskAttachmentType }) =>
+      api.updateTaskAttachment(id, params),
+    onSuccess: (_data, variables) => {
+      queryClient.invalidateQueries({ queryKey: ["task-detail", variables.params.taskId] });
+      queryClient.invalidateQueries({ queryKey: ["tasks-by-task-phase"] });
+      queryClient.invalidateQueries({ queryKey: ["project"] });
+    },
+  });
+};
+
+export const useDeleteTaskAttachment = () => {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: ({ id }: { id: string; taskId: string }) => api.deleteTaskAttachment(id),
+    onSuccess: (_data, variables) => {
+      queryClient.invalidateQueries({ queryKey: ["task-detail", variables.taskId] });
+      queryClient.invalidateQueries({ queryKey: ["tasks-by-task-phase"] });
+      queryClient.invalidateQueries({ queryKey: ["project"] });
+    },
+  });
+};
diff --git a/src/pages/taskmanager/task/service/TaskService.ts b/src/pages/taskmanager/task/service/TaskService.ts
index 76a886e..b96f987 100644
--- a/src/pages/taskmanager/task/service/TaskService.ts
+++ b/src/pages/taskmanager/task/service/TaskService.ts
@@ -11,6 +11,7 @@ import {
   GetTasksByTaskPhaseResponse,
   UpdateCheckListItemResponse,
   UpdateCheckListItemType,
+  UpdateTaskAttachmentType,
   UpdateTaskType,
 } from "../types/TaskTypes";
 
@@ -85,3 +86,13 @@ export const createTaskAttachment = async (params: CreateTaskAttachmentType) =>
   const { data } = await axios.post(`/task-manager/attachments`, params);
   return data;
 };
+
+export const updateTaskAttachment = async (id: string, params: UpdateTaskAttachmentType) => {
+  const { data } = await axios.patch(`/task-manager/attachments/${id}`, params);
+  return data;
+};
+
+export const deleteTaskAttachment = async (id: string) => {
+  const { data } = await axios.delete(`/task-manager/attachments/${id}`);
+  return data;
+};
diff --git a/src/pages/taskmanager/task/types/TaskTypes.ts b/src/pages/taskmanager/task/types/TaskTypes.ts
index cead948..5614a20 100644
--- a/src/pages/taskmanager/task/types/TaskTypes.ts
+++ b/src/pages/taskmanager/task/types/TaskTypes.ts
@@ -111,6 +111,13 @@ export type CreateTaskAttachmentType = {
   taskId: string;
 };
 
+export type UpdateTaskAttachmentType = {
+  file: string;
+  title: string;
+  type: "file" | "link";
+  taskId: string;
+};
+
 export type TaskDetailType = {
   id: string;
   createdAt: string;