A 14-year-old girl was stabbed in the chest by a young woman in a Brooklyn subway station Saturday night — after the girl whipped out a Taser during an argument.

The teen is expected to survive the stabbing, and police were trying to find her attacker.

The incident began when the teen got into a heated exchange with the 18-year-old woman shortly after 6 p.m. in the stairwell of the No. 3 Sutter Avenue-Rutland Road subway station in Brownsville, according to cops.

The teen then pulled out a Taser and tried to shock the woman, cops said.

Police say the woman responded by whipping out a knife and stabbing the girl in the chest.

The woman fled the scene with about eight to 10 people, according to cops.

The 14-year-old girl remained at Brookdale Hospital.

The train station was taped off while cops conducted an investigation Saturday night.

“This part of Brooklyn isn’t right,” Bruce Lyle, 48, told The Post at the station on Sunday morning. “That station has lots of crime. Teenagers, Lord, these are dark days.”

The MTA tweeted around 8 p.m. that trains were bypassing the station due to police activity, and offered nearby bus service.

Witnesses described the chaotic scene, saying the conductor told all straphangers to get off a train that arrived at the station shortly after the bloodshed.

“People were running. We heard it was a stabbing. We didn’t know what was going on,” a female passenger who declined to give her name told The Post.

Straphanger Eunice Brown, 37, called the incident “horrible news” and said the Sutter Avenue subway station is known to be dangerous.

“Something always happens at this train station. I’m not shocked to hear that there was a stabbing today,” Brown said.

“This train station is very dangerous. This area is. It needs more protection. It needs more police and supervision.”

Additional reporting C.J. Sullivan