A driving mode switching apparatus for a four-wheel-drive vehicle, which switches driving modes of the four-wheel drive vehicle, includes a motor, a reduction mechanism being transmitted with a rotational force of the motor, an output rod connected to the reduction mechanism and switching the driving modes by being displaced, a housing housing the motor and the reduction mechanism, a temperature sensor arranged at a position away from the motor within the housing and detecting ambient temperature in the housing, and a controller varying an output property of the motor in response to a detected temperature by the temperature sensor.