Staff members at an adult entertainment store in Dandenong have been left incensed after a man robbed their store last month.

Police have been told an unknown man entered the adult store and approached the counter to ask staff about incense sticks just after 10pm on Thursday 17 March.

It is believed the man pulled out a knife and threatened the staff member before making demands for incense sticks and cash.

A small amount of cash and incense sticks were handed over and the offender, who was wearing a yellow hooded jumper, fled the scene.

Dandenong Crime Investigation Unit detectives are investigating and have released an image of a man who they believe may be able to assist with their enquiries.