A Bronx cop gets busted for buying weed — in his own precinct:

A Bronx cop assigned to the “buy-and-bust” division was nabbed for scoring marijuana in the same precinct he was assigned to protect, the NYPD said.

Ten-year veteran officer, Milton Smith, 44, was arrested at 4 a.m. at University Avenue and West 179th Street for buying an unspecified amount of dope — within the boudaries of the 46th Precinct where the officer was assigned to catch dealers in sting operations, according to his wife, Dahlia.

“He was in the ‘buy-and-bust’ division or that’s what he told me,” the shocked woman told The Post. “It’s really unbelievable.”

Although they are separated, Dahlia said Smith is a “devoted father” to their son and “loves his job.”

“I can’t believe he’d be capable of something like that,” she said.

Smith, who was off-duty at the time, was charged with criminal possession of marijuana and official misconduct. He has been suspended without pay and was released without bail last night.