A riding type mower comprises: a plurality of wheels; a vehicle body supported by the plurality of wheels; a water-cooled engine located in a rear region of the vehicle body; a hood for covering the engine; a driver's seat located forwardly of the hood; a rollover protection frame located between the driver's seat and the water-cooled engine, the rollover protection frame having a pair of right and left support columns spaced apart from each other in a lateral direction; a radiator for the water-cooled engine located between the pair of the support columns of the rollover protection frame.