A 37-year-old man was slashed in the face during a clash on a Brooklyn subway train early Saturday, police said.

The attack comes as cops try to get a handle on an uptick in assaults on city subway lines.

The victim was on a Manhattan-bound Q train rumbling into the Church Ave. subway stop in Flatbush at around 6:30 a.m. when another commuter confronted him.

The suspect pulled out a sharp object and slashed the victim in the face, cops said.

Wounded and bleeding, the victim got off the train at Church Ave. and alerted police. EMS rushed him to Kings County Hospital, where he was treated for a minor wound.

His attacker remained on the train, then got off at the next stop on Beverly Road, police said.

It wasn’t immediately made clear what led to the slashing.

The slasher was descr

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