The robbers looted Raman Kumar in his grocery shop in the Katla Bazar and escaped on their motorcycles, police said.
According to the complaint, three robbers entered Kumar's grocery store, when he was alone in the shop, and looted him at gunpoint.
Efforts were being made to arrest the robbers, police said.
Meanwhile, traders met police officials at city police station and expressed their annoyance over the alleged increase in the criminal activities in Rewari.