According to one embodiment, a transporter includes a conveyor, a restrainer, and a restrainer moving unit. The conveyor conveys an object in a first direction. The conveyor is movable in a second direction. The restrainer is disposed corresponding to a downstream end of the conveyor in the first direction. The restrainer moving unit keeps, in a case where a position of the conveyor relative to an object-transporting destination is out of a preset range, the restrainer at a restraining position at which the restrainer restrains a movement of the object. The restrainer moving unit starts to move, in a case where the position of the conveyor relative to the object-transporting destination is in the preset range, the restrainer toward a releasing position at which the restrainer allows the movement of the object.