An NYPD cop fractured his skull and collarbone in a fall from a fire escape during a chase in Brooklyn Friday night, police said.

The 22-year-old officer fell 15 feet while racing down the fire escape after a suspect in a street drug deal, cops said. The suspect was caught near the scene later.

The cop, whose name was not released, fell from the rear of a three-story apartment building on Georgia Ave. near Dumont Ave. in Brownsville just before 9 p.m., authorities said.

He was taken to Kings County Hospital.

“He’s going to be all right,” a police source said.

A resident of the building said she “heard a big boom” and looked outside to find the injured officer bleeding and struggling to move.

“He was laid out on the floor. It was a cop bleeding from the face and nose,” said Stacey Petrona, 22, who lives in the building.

The 18-year-old suspect has 10 prior arrests for weapon possession, burglary, grand larceny and assault and drug charges, cops said.

The injured officer has two years on the job.

(Source: NY Daily News)