A pair of Good Samaritans saved a man who passed out and fell on the subway tracks Saturday morning in Manhattan, officials said.

The 63-year-old man was on the northbound 6 train platform at 51 Street and Lexington Avenue just before 12 p.m. when he fainted and fell to the tracks, just as a train was pulling into the station.

Two fellow straphangers jumped to his aid and were able to get the man back onto the platform, but not before his legs were struck by the train, cops said.

The injured man was taken to Bellevue Hospital, in serious but stable condition, with a possible broken right leg and lacerations to his left leg, police said.

His rescuers were not injured.