Saddle type vehicle

The thermostat device 80 is attached to a lateral surface of the cylinder head 24 of the engine 11. The thermostat device 80 includes a thermostat 83 located in a housing 82, a water temperature sensor 84 located in the housing 82 above the thermostat 83, and an air discharge hole 87. The air discharge hole 87 and at least a portion of the water temperature sensor 84 are located above a cooling water flow outlet 42 of the engine 11. At least aportionof the thermostat is located below the cooling water flow outlet 42 of the engine 11.