The present invention provides a combine easily checking a closing position of a rail. The combine comprises: a feed chain (7); a rail device (27) having a rail of which a position can be changed, in a closing position close to the feed chain (7); a rail position detection unit (260) detecting an opening position of the rail device (27); an engine operation management unit (220) prohibiting operation of an engine E; transfer device CU; an electric motor unit MU having an electric motor (81, 119); a micro-rotation command unit (231); a rotation detection device (83, 119A); and an error determination unit (240).