Parking device

A parking device that is mounted on a vehicle, the parking device comprising:

• a parking pawl that meshes with a parking gear provided on an output shaft of a transmission;
• a cam that engages and disengages the parking pawl to and from the parking gear;
• a piston that drives the cam and is operated by hydraulic pressure;
• a movement restraining member that is configured to hold the piston on a side to which the piston is configured to be operated by the hydraulic pressure and which includes a plunger formed of a magnetic material part;
• and
• a solenoid that switches a mode of movement of the movement restraining member between a restrained mode and an allowed mode, wherein
• the solenoid includes a permanent magnet that restrains the movement of the movement restraining member with a magnetic force, a coil configured to induce a magnetic flux releases the restraint caused by the permanent magnet on the movement of the movement restraining member when the coil is energized in the allowed mode, an elastic member that urges the movement restraining member toward the piston with an elastic force, and an attracting portion that attracts the plunger toward the piston with a magnetic flux caused by the permanent magnet.