Cops are looking for a creep who allegedly exposed himself to a woman on a subway car in Manhattan before putting his hand up her skirt.

The man allegedly approached a 20-year-old female on a southbound E Train at about 8 p.m. on Monday and exposed his groin, according to police.

The suspect then got off the train at the Broadway and Chambers Street station and followed the woman.

While she was climbing the stairs, the creep allegedly reached up her skirt from behind and touched her inner thigh, cops said.

He then fled the subway station.