diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 81b35c6f063..b89e14b5bcf 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -771,6 +771,14 @@ class SalesOrder(SellingController):
 			voucher_type=self.doctype, voucher_no=self.name, sre_list=sre_list, notify=notify
 		)
 
+	def set_missing_values(self, for_validate=False):
+		super().set_missing_values(for_validate)
+
+		if self.delivery_date:
+			for item in self.items:
+				if not item.delivery_date:
+					item.delivery_date = self.delivery_date
+
 
 def get_unreserved_qty(item: object, reserved_qty_details: dict) -> float:
 	"""Returns the unreserved quantity for the Sales Order Item."""