Have you seen this man? 

Authorities are asking for the public’s help to find a man who they say exposed himself on the subway this week. 

A victim snapped a photo of the man while riding a southbound 1 train around 7 a.m. Thursday morning at the 242nd Street subway station, police said.

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The suspect is described as a black man in his 30s with a medium build wearing glasses. At the time, he was wearing a gray hooded sweater, black sweatpants and gray sneakers. 

If you recognize the man, call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477).