A man stabbed a 40-year-old woman and then sexually assaulted her in a disturbing Queens attack, authorities said.

The assailant approached the victim in the rear of a building on 153rd Street near Tuskegee Airmen Way in Jamaica at 10:10 p.m. Friday, stabbed her once in the chest and forced her to perform a sexual act, police said.

He then took off, cops said.

The victim went to Jamaica Hospital Medical Center in stable condition.

Police released footage of the suspect late Monday and said he remained at large.

The black-and-white clip shows the suspect near the scene before the attack, and the color video shows him after the incident at Shore Avenue and Liverpool Street.