A straphanger turned the tables on a subway creep who took her photo on a Manhattan train, taking one of him and giving it to cops, police said Tuesday.

The 31-year-old victim was aboard a southbound No. 4 train around 8:30 a.m. Saturday when she noticed a man seated across from her sneak a photo of her groin area, police said.

The woman confronted the perv, managing to take a photo of him before he fled the train when it stopped at Grand Central-42nd Street in Midtown, according to police.