diff --git a/src/spaceone/cost_analysis/error/budget.py b/src/spaceone/cost_analysis/error/budget.py
index d3b7ed84..df5d4830 100644
--- a/src/spaceone/cost_analysis/error/budget.py
+++ b/src/spaceone/cost_analysis/error/budget.py
@@ -42,3 +42,7 @@ class ERROR_THRESHOLD_IS_WRONG_IN_PERCENT_TYPE(ERROR_INVALID_ARGUMENT):
 
 class ERROR_PROVIDER_FILTER_IS_EMPTY(ERROR_INVALID_ARGUMENT):
     _message = 'Provider filter is empty. (key = provider_filter.providers, value = [])'
+
+
+class ERROR_BUDGET_ALREADY_EXIST(ERROR_INVALID_ARGUMENT):
+    _message = 'Budget already exist. (data_source_id = {data_source_id}, target = {target})'
diff --git a/src/spaceone/cost_analysis/service/budget_service.py b/src/spaceone/cost_analysis/service/budget_service.py
index d28cc3ab..5348e41e 100644
--- a/src/spaceone/cost_analysis/service/budget_service.py
+++ b/src/spaceone/cost_analysis/service/budget_service.py
@@ -98,6 +98,16 @@ def create(self, params):
         # Check Notifications
         self._check_notifications(notifications)
 
+        # Check Duplicated Budget
+        budget_vos = self.budget_mgr.filter_budgets(
+            data_source_id=data_source_id,
+            project_id=project_id,
+            project_group_id=project_group_id,
+            domain_id=domain_id
+        )
+        if budget_vos.count() > 0:
+            raise ERROR_BUDGET_ALREADY_EXIST(data_source_id=data_source_id, target=project_id or project_group_id)
+
         budget_vo = self.budget_mgr.create_budget(params)
 
         # Create budget usages