Quick-thinking Port Authority cops saved the life of a Queens man who suffered a heart attack at Kennedy Airport today.

Gary Roopao, 49, was walking to Terminal 4 to pick up a relative at 7:15 a.m. when he suddenly collapsed, a Port Authority spokesman said.

Eagle-eyed officers Mike McCann and Mike Angerhauser rushed over and administered CPR to Roopao.

It was lucky they were there — Roopao was in full cardiac arrest and had no pulse, said authorities.

Officers Ernest Bohringer and Alfonso Rapisarda arrived in a Port Authority ambulance.

They revived Roopao with a defibrillator and rushed him to Jamaica Hospital, where he’s recovering in stable condition.