A caster includes a retaining portion, a caster main body, a wheel rotatably retained by the caster main body, a first lock mechanism having a first engaged portion formed on the retaining portion and a first engaging portion to be engaged with the first engaged portion, a second lock mechanism having a second engaged portion formed on an inner peripheral surface of the wheel and a second engaging portion to be engaged with the second engaged portion, an operation lever for operating the first lock mechanism and the second lock mechanism, and an elastic member configured to enable the operation lever to move to a lock position allowing engagement of the first engaging portion with the first engaged portion even when the operation lever is operated in a state in which the second engaged portion and the second engaging portion are not in phase with each other.