diff --git a/backend/tasks/tasks/serializers.py b/backend/tasks/tasks/serializers.py
index 12bea72..65ea0c2 100644
--- a/backend/tasks/tasks/serializers.py
+++ b/backend/tasks/tasks/serializers.py
@@ -1,7 +1,7 @@
 from rest_framework import serializers
 from users.models import CustomUser
 from boards.models import ListBoard
-from tasks.models import Todo, RecurrenceTask, Habit
+from tasks.models import Todo, RecurrenceTask, Habit, Subtask
 
 class TaskSerializer(serializers.ModelSerializer):
     class Meta:
@@ -97,4 +97,14 @@ class HabitTaskSerializer(serializers.ModelSerializer):
 class HabitTaskCreateSerializer(serializers.ModelSerializer):
     class Meta:
         model = Habit
-        exclude = ('tags',)
\ No newline at end of file
+        exclude = ('tags',)
+
+
+class SubTaskSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Subtask
+        fields = '__all__'
+
+    def create(self, validated_data):
+        # Create a new task with validated data
+        return Todo.objects.create(**validated_data)
\ No newline at end of file
diff --git a/backend/tasks/tasks/views.py b/backend/tasks/tasks/views.py
index fe1c82d..18a3410 100644
--- a/backend/tasks/tasks/views.py
+++ b/backend/tasks/tasks/views.py
@@ -4,10 +4,13 @@ from rest_framework import viewsets, status, serializers
 from rest_framework.decorators import action
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
+from rest_framework import mixins
 
-from .serializers import ChangeTaskListBoardSerializer, ChangeTaskOrderSerializer
+from drf_spectacular.utils import extend_schema, extend_schema_view, OpenApiParameter
+
+from tasks.tasks.serializers import ChangeTaskListBoardSerializer, ChangeTaskOrderSerializer, SubTaskSerializer
 from boards.models import ListBoard, KanbanTaskOrder
-from tasks.models import Todo, RecurrenceTask, Habit
+from tasks.models import Todo, RecurrenceTask, Habit, Subtask
 from tasks.tasks.serializers import (TaskCreateSerializer,
                                      TaskSerializer,
                                      RecurrenceTaskSerializer,
@@ -117,6 +120,59 @@ class TodoViewSet(viewsets.ModelViewSet):
             return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
     
 
+@extend_schema_view(
+list=extend_schema(
+    parameters=[
+        OpenApiParameter(name='parent_task', description='Parent Task ID', type=int),
+        ]
+    )
+)
+class SubTaskViewset(viewsets.GenericViewSet,
+                     mixins.CreateModelMixin,
+                     mixins.DestroyModelMixin,
+                     mixins.ListModelMixin):
+    queryset = Subtask.objects.all()
+    permission_classes = (IsAuthenticated,)
+
+    def get_serializer_class(self):
+        return SubTaskSerializer
+    
+    def list(self, request, *args, **kwargs):
+        """List only subtask of parent task."""
+        try:
+            parent_task = request.query_params.get('parent_task')
+            if not parent_task:
+                raise serializers.ValidationError('parent_task is required.')
+            queryset = self.get_queryset().filter(parent_task_id=parent_task)
+            serializer = self.get_serializer(queryset, many=True)
+            return Response(serializer.data)
+        
+        except Exception as e:
+            return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+
+    def create(self, request, *args, **kwargs):
+        """Create a new subtask, point to some parent tasks."""
+        try:
+            serializer = self.get_serializer(data=request.data)
+            serializer.is_valid(raise_exception=True)
+            self.perform_create(serializer)
+            return Response(serializer.data)
+        
+        except Exception as e:
+            return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+
+
+    def destroy(self, request, *args, **kwargs):
+        """Delete a subtask."""
+        try:
+            instance = self.get_object()
+            self.perform_destroy(instance)
+            return Response(status=status.HTTP_204_NO_CONTENT)
+        
+        except Exception as e:
+            return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+
+
 class RecurrenceTaskViewSet(viewsets.ModelViewSet):
     queryset = RecurrenceTask.objects.all()
     serializer_class = RecurrenceTaskSerializer
diff --git a/backend/tasks/urls.py b/backend/tasks/urls.py
index d830a65..cf37e23 100644
--- a/backend/tasks/urls.py
+++ b/backend/tasks/urls.py
@@ -3,7 +3,7 @@ from django.urls import path, include
 from rest_framework.routers import DefaultRouter
 
 from tasks.api import GoogleCalendarEventViewset
-from tasks.tasks.views import TodoViewSet, RecurrenceTaskViewSet, HabitTaskViewSet
+from tasks.tasks.views import TodoViewSet, RecurrenceTaskViewSet, HabitTaskViewSet, SubTaskViewset
 from tasks.misc.views import TagViewSet
 
 
@@ -13,6 +13,7 @@ router.register(r'daily', RecurrenceTaskViewSet)
 router.register(r'habit', HabitTaskViewSet)
 router.register(r'tags', TagViewSet)
 router.register(r'calendar-events', GoogleCalendarEventViewset, basename='calendar-events')
+router.register(r'subtasks', SubTaskViewset, basename='subtasks')
 
 urlpatterns = [
     path('', include(router.urls)),