diff --git a/backend/wiki/wiki_workspace/document/export/router.py b/backend/wiki/wiki_workspace/document/export/router.py
index 965bcdd..82225d5 100644
--- a/backend/wiki/wiki_workspace/document/export/router.py
+++ b/backend/wiki/wiki_workspace/document/export/router.py
@@ -61,8 +61,8 @@ async def export_document(
                                                      ya_disk)
     if export_type.DOCX:
         res = converters.docx.convert(html)
-        headers = {"Content-Disposition": f'attachment; filename="{title}".docx'}
-        return Response(res, headers=headers, media_type="application/pdf")
+        headers = {"Content-Disposition": f'attachment; filename*=UTF-8\'\'"{title}"'}
+        return Response(res, headers=headers, media_type="application/vnd.openxmlformats-officedocument.wordprocessingml.document")
 
     raise Exception
 
diff --git a/backend/wiki/wiki_workspace/document/repository.py b/backend/wiki/wiki_workspace/document/repository.py
index e4c326f..d925a23 100644
--- a/backend/wiki/wiki_workspace/document/repository.py
+++ b/backend/wiki/wiki_workspace/document/repository.py
@@ -1,7 +1,7 @@
 from typing import Optional
 from uuid import UUID
 
-from sqlalchemy import select, and_
+from sqlalchemy import select, and_, update
 from starlette import status
 
 from wiki.common.exceptions import WikiException, WikiErrorCode
@@ -41,13 +41,22 @@ async def _get_result_document_with_permission(self, user_id: UUID, *whereclause
             *whereclause
         )
 
-    async def get_documents_with_permission(self, user_id: UUID) -> list:
-        res = await self._get_result_document_with_permission(user_id)
+    async def get_documents_with_permission(self, user_id: UUID, is_only_existing: bool = True) -> list:
+        whereclause = []
+        if is_only_existing:
+            whereclause.append(Document.is_deleted == False)
+        res = await self._get_result_document_with_permission(user_id, *whereclause)
         return res.all()
 
     @menage_db_not_found_result_method(NotFoundResultMode.EXCEPTION, ex=document_not_found_exception)
-    async def get_document_with_permission_by_id(self, user_id: UUID, document_id: UUID):
-        res = await self._get_result_document_with_permission(user_id, Document.id == document_id)
+    async def get_document_with_permission_by_id(self,
+                                                 user_id: UUID,
+                                                 document_id: UUID,
+                                                 is_only_existing: bool = True):
+        whereclause = [Document.id == document_id]
+        if is_only_existing:
+            whereclause.append(Document.is_deleted == False)
+        res = await self._get_result_document_with_permission(user_id, *whereclause)
         return res.first()
 
     @menage_db_not_found_result_method(NotFoundResultMode.EXCEPTION, ex=document_not_found_exception)
@@ -82,6 +91,11 @@ async def mark_document_delete(self, document_id: UUID):
         document = await self.get_document_by_id(document_id)
         document.is_deleted = True
 
+        query = (update(Document).where(Document.parent_document_id == document_id)
+                 .values(parent_document_id=document.parent_document_id))
+
+        await self.session.execute(query)
+
         self.session.add(document)
 
     @menage_db_commit_method(CommitMode.FLUSH)
diff --git a/backend/wiki/wiki_workspace/document/router.py b/backend/wiki/wiki_workspace/document/router.py
index 41ff885..97b6c82 100644
--- a/backend/wiki/wiki_workspace/document/router.py
+++ b/backend/wiki/wiki_workspace/document/router.py
@@ -174,6 +174,14 @@ async def delete_document(
         session: AsyncSession = Depends(get_db),
         user: WikiUserHandlerData = Depends(BasePermission(responsibility=ResponsibilityType.VIEWER))
 ):
+    """
+    ## Deleted document by id
+    **You have to have a deletion permission or be an administrator.**
+
+    When a document is deleted, the hierarchy changes:
+    all child documents become child documents of the parent.
+    """
+
     document_repository: DocumentRepository = DocumentRepository(session)
     if user.wiki_api_client.responsibility != ResponsibilityType.ADMIN:
         document = await document_repository.get_document_with_permission_by_id(user.id, document_id)
@@ -186,7 +194,9 @@ async def delete_document(
     else:
         document = await document_repository.get_document_by_id(document_id)
 
-    await document_repository
+    await document_repository.mark_document_delete(document.id)
+
+    return BaseResponse(msg="Document deleted")
 
 
 @document_router.post(
diff --git a/docs/swagger.yaml b/docs/swagger.yaml
index 87df71f..3a88536 100644
--- a/docs/swagger.yaml
+++ b/docs/swagger.yaml
@@ -2541,6 +2541,47 @@ paths:
       summary: Get tree documents
       tags:
       - WorkspaceDocument
+  /api/v1/document/{document_id}:
+    delete:
+      description: '## Deleted document by id
+
+        **You have to have a deletion permission or be an administrator.**
+
+
+        When a document is deleted, the hierarchy changes:
+
+        all child documents become child documents of the parent.'
+      operationId: delete_document_api_v1_document__document_id__delete
+      parameters:
+      - in: path
+        name: document_id
+        required: true
+        schema:
+          format: uuid
+          title: Document Id
+          type: string
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/BaseResponse'
+          description: Successful Response
+        '422':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/HTTPValidationError'
+          description: Validation Error
+      security:
+      - WikiRootApiKey: []
+      - WikiApiKey: []
+      - WikiApiKey: []
+      - WikiAccessToken: []
+      - WikiBearer: []
+      summary: Delete document
+      tags:
+      - WorkspaceDocument
   /api/v1/document/{document_id}/publish:
     post:
       description: '## Publish document