A police officer was knocked onto the tracks of a Jamaica subway station by a fare beater he was chasing, cops said.

The officer and his partner on Sunday at 12:20 a.m. witnessed the group of four suspects, two men and two women, sneaking through the service gate of the Parson/Archer Avenue station, according to police.

When the cops tried to stop the crew, one of the men knocked the officer down and onto the tracks.

His partner assisted him safely back onto the platform while the suspects ran away.

No arrests have been made.