A man was caught sexually attacking a woman in the ATM vestibule of a Greenwich Village bank, authorities said yesterday.

Witnesses spotted Trasajlla Gillbey, 27, with his pants down on top of a 47-year-old woman in the Chase Bank at Broadway and West 10th Street at around 7 p.m. Monday, according to a court complaint.

Onlookers called 911, and cops placed Gillbey under arrest. He was held in lieu of $1,500 bond.