POLICE are searching for a man who exposed himself to a mother and daughter during AFL Grand Final celebrations attended by tens of thousands of Richmond fans in Melbourne.

The man was seated behind the woman and her 14-year-old daughter at Punt Road Oval on October 1 during Richmond's family day when he exposed himself and began masturbating, Victoria Police said on Monday.

Police have released a facial composite of the man, who is described as being his 60s, tall with a pale complexion and moles on his legs, dressed in a navy jumper and shorts and carrying a Richmond Tigers scarf.