PROBLEM TO BE SOLVED: To solve problems in a waste culm cutter of a combine in which a cutter width is wide, the operation for switching between long cut and short cut by moving a rotor axis longitudinally is hard to be performed, furthermore, a discharge width area of straw is often adjusted according to this waste culm cut length, and therefore cumbersome and long-time operation troubles are required.SOLUTION: A waste culm cutter of a combine is provided with a discharge guide plate 5 for discharging and guiding cut-off straw after receiving thereof, in the lower part of a pair of rotor shafts 1 and cutter shafts 2 in a parallel shape. In the waste culm cutter of the combine, the discharge guide plate 5 is interlocked to a direct discharge position D when the rotor shaft 1 is moved/operated and a cut length of waste culm is switched to a long cut position L, and is interlocked so as to be switched to a guidance posture to a diffusion exhaust position W when switched to a short cut position M.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】コンバインの排稈カッターにおいては、カッター幅が広く、ローター軸を前後に移動させて長切り、短切りに切替える操作が行われ難く、しかもこの排稈切断長さに応じて、わらの排出幅域をも調整することが多く、煩雑で長時間の操作手数を要する。【解決手段】平行状で一対のローター軸1及びカッター軸2の下方に、切落とされるわらを受けて排出案内する排出案内板5を設けるコンバインの排稈カッターにおいて、ローター軸1を移動操作して排稈の切断長さを長切り位置Lに切替えるときは、排出案内板5を直下排出位置Dへ、短切り位置Mに切替えるときは、拡散排出位置Wへの案内姿勢に切替え可能に連動構成する。【選択図】図1