PURPOSE: To easily arrange a pedal pipe on the right or left according to an importing country by arranging hydraulic pipes between the braking units for a rear wheel and a front wheel operated by a braking pedal respectively so that they partially cross a vehicle body and the other sections are extended on both sides of the vehicle body.

CONSTITUTION: The middle portion of a hydraulic pipe 9 arranged between the portion of a hydraulic pipe 93 connected to a front wheel braking force control device 14 fitted to a front wheel brake unit 1 on the right side and the portion of a hydraulic pipe 92 connected to a rear wheel brake unit 4 on the left side of a vehicle body is arranged to a pipe 94 across a part of the vehicle body. Portions 9, 92, 93 of other hydraulic pipes are arranged to extend on one side and the other side of the vehicle body, and an oil pressure generating device 8 provided with a brake pedal 7 is fitted to the portion 9 of the hydraulic pipe extended on the side of the vehicle body. The oil pressure generating device 8 provided with the brake pedal 7 can be easily provided on the left side or the right side of the vehicle body without largely changing the layout of the hydraulic pipes.