A 34-year-old man was stabbed during a midday squabble on a Brooklyn train Friday, cops said. 

The victim got into a dispute with another straphanger — who knifed him in the stomach — on an M train at the Myrtle Avenue/Broadway station in Bushwick around 1:45 p.m., authorities said. 

He was taken to the Kings County Hospital Center with non-life-threatening injuries, cops said. 

The suspect, who cops say had his hair pulled back in a ponytail and wore a gray shirt and black pants, fled on a Manhattan-bound train, police said. 

The nature of the dispute between the two men was not immediately known.