A selectable one-way clutch comprising: a first plate; a second plate placed on the same axis as the first plate; a claw configured to project from the first plate toward the second plate, the claw being provided in the first plate, the claw being configured to mesh with a recessed portion in a case where the claw projects from the first plate only when the second plate rotates in one predetermined direction, the recessed portion being provided in the second plate; and a selector plate placed adjacent to the first plate, the selector plate being configured to rotate relative to the first plate between a locked position at which the claw projects from the first plate and a released position at which the claw is maintained to be accommodated on a first-plate-side; the selectable one-way clutch being characterized in that it comprises a plate driving device (5A, 5B) configured to rotationally drive the selector plate, the plate driving device (5A, 5B) including a drive arm (21, 51), an actuator (22, 52), a transmission mechanism (23, 53), a stopper (24, 54), and a release mechanism (25, 55), the drive arm (21, 51) extending from the selector plate, the actuator (22, 52) being configured to output a driving force to drive the selector plate via the drive arm (21, 51) at a time of operation, the transmission mechanism (23, 53) being configured to transmit, to the drive arm (21, 51), the driving force output from the actuator (22, 52), such that the selector plate rotates from the released position to the locked position, the stopper (24, 54) being configured to move between a restricted position at which a rotation of the selector plate from the released position to the locked position is restricted and an unrestricted position at which the restriction is released, the stopper (24, 54) being configured to be placed at the restricted position at a time of non-operation of the actuator (22, 52), the release mechanism (25, 55) being configured to transmit, to the stopper (24, 54), the driving force output at the time of operation of the actuator (22, 52) such that the stopper (24, 54) moves from the restricted position to the unrestricted position. a first plate; a second plate placed on the same axis as the first plate; a claw configured to project from the first plate toward the second plate, the claw being provided in the first plate, the claw being configured to mesh with a recessed portion in a case where the claw projects from the first plate only when the second plate rotates in one predetermined direction, the recessed portion being provided in the second plate; and a selector plate placed adjacent to the first plate, the selector plate being configured to rotate relative to the first plate between a locked position at which the claw projects from the first plate and a released position at which the claw is maintained to be accommodated on a first-plate-side; the selectable one-way clutch being characterized in that it comprises a plate driving device (5A, 5B) configured to rotationally drive the selector plate, the plate driving device (5A, 5B) including a drive arm (21, 51), an actuator (22, 52), a transmission mechanism (23, 53), a stopper (24, 54), and a release mechanism (25, 55), the drive arm (21, 51) extending from the selector plate, the actuator (22, 52) being configured to output a driving force to drive the selector plate via the drive arm (21, 51) at a time of operation, the transmission mechanism (23, 53) being configured to transmit, to the drive arm (21, 51), the driving force output from the actuator (22, 52), such that the selector plate rotates from the released position to the locked position, the stopper (24, 54) being configured to move between a restricted position at which a rotation of the selector plate from the released position to the locked position is restricted and an unrestricted position at which the restriction is released, the stopper (24, 54) being configured to be placed at the restricted position at a time of non-operation of the actuator (22, 52), the release mechanism (25, 55) being configured to transmit, to the stopper (24, 54), the driving force output at the time of operation of the actuator (22, 52) such that the stopper (24, 54) moves from the restricted position to the unrestricted position. the drive arm (21, 51) extending from the selector plate, the actuator (22, 52) being configured to output a driving force to drive the selector plate via the drive arm (21, 51) at a time of operation, the transmission mechanism (23, 53) being configured to transmit, to the drive arm (21, 51), the driving force output from the actuator (22, 52), such that the selector plate rotates from the released position to the locked position, the stopper (24, 54) being configured to move between a restricted position at which a rotation of the selector plate from the released position to the locked position is restricted and an unrestricted position at which the restriction is released, the stopper (24, 54) being configured to be placed at the restricted position at a time of non-operation of the actuator (22, 52), the release mechanism (25, 55) being configured to transmit, to the stopper (24, 54), the driving force output at the time of operation of the actuator (22, 52) such that the stopper (24, 54) moves from the restricted position to the unrestricted position.