To provide an inexpensive auxiliary brake device for an industrial vehicle such as a folklift.

A hydraulic pump 18 driven by an output shaft 15 installed in a transmission 12, for transmitting the rotational force of an engine 14 to both front wheels 3 is installed on the vehicular main body 9 of a folklife equipped standardly with a wheel brake 1 and a circulation circuit 24 for returning an oil discharged from a discharge port 22 to an suction port 23 is connected to the hydraulic pump 18 and a throttle valve 30 for throttling a flow rate in accordance with the operation amount of a brake pedal 5 is installed on the way of the circulation circuit 24.