A traverser includes a base unit including a rail member, a moving unit configured to reciprocally move on the rail member between a first position and a second position, and a conveyance unit mounted on the moving unit and configured to convey a conveyance target object. The moving unit include a first travel roller that is a drive roller, and a drive mechanism configured to give a rotation driving force to the first travel roller. The drive mechanism includes a travel motor configured to supply the rotation driving force, and a friction transmission mechanism configured to transmit the rotation driving force of the travel motor to the first travel roller by a friction force.