An electronic control unit (51) inputs the temperature of the heated side of thermoelectric transducers (31) incorporated into the brake units (13,14) of left and right rear wheels (RW1, RW2) from temperature sensors (42, 43). When the temperature of the heated side is equal to or less than a prescribed temperature that is set in advance, the electronic control unit (51) controls the drive of a brake hydraulic control unit (20) to operate with priority on the brake units (13, 14) over the brake units (11, 12) of left and right front wheels (FW1, FW2). As a result, the brake units (13, 14) generate frictional heat due to friction and heat the heated side of the thermoelectric transducers (31), and the thermoelectric transducers (31) efficiently recover the thermal energy and generate power. Conversely, when the temperature of the heated side is higher than the prescribed temperature, the electronic control unit (51) controls the drive of the brake hydraulic control unit (20) to increase the proportion of brake force generated by the brake units (11, 12) while lessening the proportion of brake force generated by the brake units (13, 14). This allows the vehicle to brake adequately.