Provided is a working vehicle capable of efficiently cooling an engine, a torque converter oil and a hydraulic oil.There are provided an engine 11, a torque converter 12, a hydraulic working device 15 to be operated by a hydraulic oil 31, a radiator 16 for radiating heat of engine cooling water 32 for cooling the engine 11, an oil cooler 17 for radiating heat of the hydraulic oil 31, and a heat exchanger 19 for performing a heat exchange between a torque converter oil 33 to be used for the torque converter 12 and the hydraulic oil 31. The torque converter oil 33 is heat exchanged with the hydraulic oil 31. Therefore, heat of the torque converter oil 33 is radiated by the oil cooler 17 through the hydraulic oil 31. Also in a running operation, the heat can be radiated by both of the radiator 16 and the oil cooler 17, and the engine 11, the torque converter oil 33 and the hydraulic oil 31 can be cooled efficiently.