Brake hydraulic pressure control device for handlebar vehicle

A brake hydraulic pressure control device for a handlebar vehicle, configured to perform anti-lock brake control, the brake hydraulic pressure control device includes: a base formed with brake fluid passages; and a pressure reducing valve provided at a brake line, which connects a master cylinder and the base, to reduce the rate of increase of the brake hydraulic pressure to be input to the base with respect to the rate of increase of the brake hydraulic pressure generated in the master cylinder as a valve body operates due to the differential hydraulic pressure between the brake hydraulic pressure on the side of the master cylinder and the brake hydraulic pressure on the side of the base.