diff --git a/addons/mrp/report/mrp_report_bom_structure.py b/addons/mrp/report/mrp_report_bom_structure.py
index 3e253feb3f4..ebff4ea6a1d 100644
--- a/addons/mrp/report/mrp_report_bom_structure.py
+++ b/addons/mrp/report/mrp_report_bom_structure.py
@@ -218,7 +218,13 @@ class ReportBomStructure(models.AbstractModel):
                                                parent_product=product, index=new_index, product_info=product_info, ignore_stock=ignore_stock)
             else:
                 component = self._get_component_data(bom, product, warehouse, line, line_quantity, level + 1, new_index, product_info, ignore_stock)
-            components.append(component)
+
+            for component_bom in components:
+                if component['product_id'] == component_bom['product_id'] and component['uom'].id == component_bom['uom'].id:
+                    self._merge_components(component_bom, component)
+                    break
+            else:
+                components.append(component)
             bom_report_line['bom_cost'] += component['bom_cost']
         bom_report_line['components'] = components
         bom_report_line['producible_qty'] = self._compute_current_production_capacity(bom_report_line)
@@ -601,3 +607,15 @@ class ReportBomStructure(models.AbstractModel):
     @api.model
     def _has_attachments(self, data):
         return data['attachment_ids'] or any(self._has_attachments(component) for component in data.get('components', []))
+
+    @api.model
+    def _merge_components(self, component_1, component_2):
+        qty = component_2['quantity']
+        component_1["quantity"] = component_1["quantity"] + qty
+        component_1["base_bom_line_qty"] = component_1["quantity"] + qty
+        component_1["prod_cost"] = component_1["prod_cost"] + component_2["prod_cost"]
+        component_1["bom_cost"] = component_1["bom_cost"] + component_2["bom_cost"]
+        if not component_1.get("components"):
+            return
+        for index in range(len(component_1.get("components"))):
+            self._merge_components(component_1["components"][index], component_2["components"][index])