diff --git a/doccano/app/server/models.py b/doccano/app/server/models.py
index 0a44dbc8..4f74b858 100644
--- a/doccano/app/server/models.py
+++ b/doccano/app/server/models.py
@@ -23,6 +23,9 @@ class Label(models.Model):
                 'text': self.text,
                 'shortcut': self.shortcut}
 
+    def __str__(self):
+        return self.text
+
 
 class Document(models.Model):
     text = models.TextField()
@@ -32,6 +35,9 @@ class Document(models.Model):
         return {'id': self.id,
                 'text': self.text}
 
+    def __str__(self):
+        return self.text[:50]
+
 
 class Annotation(models.Model):
     prob = models.FloatField(blank=True, null=True)
@@ -41,7 +47,7 @@ class Annotation(models.Model):
 
     def as_dict(self):
         return {'id': self.id,
-                'data_id': self.data.id,
-                'label_id': self.label.id,
+                'doc': self.data.as_dict(),
+                'label': self.label.as_dict(),
                 'prob': self.prob,
                 'manual': self.manual}
diff --git a/doccano/app/server/templates/project_admin.html b/doccano/app/server/templates/project_admin.html
index 57f7fa15..3cc6a6d8 100644
--- a/doccano/app/server/templates/project_admin.html
+++ b/doccano/app/server/templates/project_admin.html
@@ -106,6 +106,14 @@
                                         </span>
                                     </label>
                                 </div>
+                                <br>
+                                <p>Data Download</p>
+                                <a class="button" href="{% url 'download' project.id %}">
+                                    <span class="icon">
+                                        <i class="fas fa-download"></i>
+                                    </span>
+                                    <span>Download</span>
+                                </a>
                             </div>
                         </div>
                     </div>
diff --git a/doccano/app/server/urls.py b/doccano/app/server/urls.py
index 52f0b0c4..5d91e66c 100644
--- a/doccano/app/server/urls.py
+++ b/doccano/app/server/urls.py
@@ -1,12 +1,13 @@
 from django.urls import path
 
 from .views import AnnotationView, AnnotationAPIView, ProgressAPI, SearchAPI, InboxView
-from .views import ProjectListView, ProjectAdminView, RawDataAPI, LabelAPI
+from .views import ProjectListView, ProjectAdminView, RawDataAPI, LabelAPI, DataDownloadAPI
 
 urlpatterns = [
     path('', ProjectListView.as_view(), name='project-list'),
     path('<int:pk>/admin', ProjectAdminView.as_view(), name='project-admin'),
     path('<int:project_id>/', AnnotationView.as_view(), name='annotation'),
+    path('<int:project_id>/download', DataDownloadAPI.as_view(), name='download'),
     path('<int:project_id>/inbox', InboxView.as_view(), name='inbox'),
     path('<int:project_id>/apis/data', AnnotationAPIView.as_view()),
     path('<int:pk>/apis/raw_data', RawDataAPI.as_view(), name='data_api'),
diff --git a/doccano/app/server/views.py b/doccano/app/server/views.py
index 68a7676c..4cba995b 100644
--- a/doccano/app/server/views.py
+++ b/doccano/app/server/views.py
@@ -1,6 +1,6 @@
 import json
 
-from django.http import JsonResponse
+from django.http import JsonResponse, HttpResponse
 from django.shortcuts import render
 from django.views import View
 from django.views.generic.list import ListView
@@ -174,3 +174,15 @@ class ProjectAdminView(DetailView):
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         return context
+
+
+class DataDownloadAPI(View):
+
+    def get(self, request, *args, **kwargs):
+        # j = {'hoge': 'fuga'}
+        annotated_docs = [a.as_dict() for a in Annotation.objects.filter(manual=True)]
+        json_str = json.dumps(annotated_docs)
+        response = HttpResponse(json_str, content_type='application/json')
+        response['Content-Disposition'] = 'attachment; filename=annotation_data.json'
+
+        return response