Cops are searching for a man wanted for public lewdness on the subway.

According to NYPD, on October 9 around 8:30 a.m., a 27-year-old woman saw a man masturbating on a Brooklyn-bound R train at the East 59 Street and Lexington Avenue stop station.

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The victim took a photo on her cellphone before she left the subway car.

Police have described the suspect as a black male who was last seen wearing blue jeans, a plaid shirt, a blue and red vest and a black knit cap.

Police are asking anyone with information to contact Crime Stoppers at 800-577-TIPS or to submit tips online.