A teenager was clinging to life after he was stabbed in the groin outside a subway station in Sheepshead Bay Saturday night, cops said.

Another teen was in custody following the attack, which unfolded just after 9 p.m. at East 15th Street and Sheepshead Bay Road, according to the NYPD.

Charges were pending against a 16-year-old boy after he stabbed a 17-year-old boy following an argument, police said.

The victim was critically injured and taken to Lutheran Hospital, authorities said.

The teens’ identities were not released.