PROBLEM TO BE SOLVED: To provide a combine which enables a rail closing posture to be confirmed easily even with a posture changeable constitution between the closing posture and an open posture with respect to a feed chain.SOLUTION: A combine includes: a feed chain 7 driven by a rotation power of an engine E and conveying grain culms reaped in a reaping part 1 to a threshing device 4 a rail mechanism 27 including a rail whose posture is changeable between a closing posture approaching the feed chain 7 so as to guide the grain culms conveyed by the feed chain 7 from an upper side and an open posture separating upward from the feed chain 7 a rail posture detection part 260 detecting the open posture of the rail mechanism 27 and an engine drive management part 220 prohibiting drive of the engine E subject to detection of the open posture by the rail posture detection part 260.SELECTED DRAWING: Figure 1
