diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.py b/erpnext/stock/doctype/stock_entry/stock_entry.py
index 8b072c6..8d746ba 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.py
@@ -177,6 +177,10 @@
 		stock_items = self.get_stock_items()
 		serialized_items = self.get_serialized_items()
 		for item in self.get("items"):
+			if item.qty and item.qty < 0:
+				frappe.throw(_("Row {0}: The item {1}, quantity must be positive number")
+					.format(item.idx, frappe.bold(item.item_code)))
+
 			if item.item_code not in stock_items:
 				frappe.throw(_("{0} is not a stock Item").format(item.item_code))