Parking brake device for motorcycle

A parking brake device (3) for a motorcycle includes an operation unit (4) and a stand unit (6). Theoperation unit (4) includes a hydraulic pump (41), a piston rod (42) extending into the hydraulic pump (41), and a control stick (43) operable to drive movement of the piston rod (42) from a free position to a brake position where the piston rod (42) is configured to pressurize brake fluid in the hydraulic pump (41). The stand unit (6) includes a kickstand (61) operable for pivoting between rest and parking positions, and a transmission cable (62) having opposite first and second ends (621, 622) respectively fastened to the piston rod (42) and the kickstand (61). The piston rod (42) moves from the free position to the brake position when the kickstand (61) pivots from the rest position to the parking position, and moves from the brake position to the free position when the kickstand (61) pivots from the parking position to the rest position.