A medium storage box includes a storage unit that stores a medium, a handle configured to rotate in a first direction from a first state to a second state and a second direction opposite to the first direction from the second state to the first state, and a rotation restricting portion that prevents rotation of the handle in the second direction. The handle includes a grip portion and an arm that includes an upper surface portion or a top portion and extends in an extending direction toward the upper surface portion or the top portion from the rotational axis. The arm is configured such that an end portion of an arm center line side in the upper surface portion or the top portion is separated toward a first direction side with respect to an arm center line extending from the rotational axis to the extending direction.