PROBLEM TO BE SOLVED: To provide a combine harvester capable of preventing the interference of a supplemental conveying device with a feed chain, when a reaping part is rotatively opened in forward direction.SOLUTION: This combine harvester is provided by including a reaping part 3 for reaping cereal culms, a feed chain 12 for conveying the cereal culms to a threshing part 4 and a conveying part 5 having a supplemental conveying device 13 arranged at the frontal direction of the feed chain 12 and installed between the reaping part 3 and feed chain 12, making the reaping part 3 as capable of rotatively opening in a forward direction by using the feed chain 12 side as a fulcrum, arranging a reaping first shaft case 50 for housing the reaping first shaft 47 of the reaping part 3 in right and left horizontal direction in front of the threshing part 4, linking the one end of feed chain 12 side of the reaping first shaft case 50 with the supplemental conveying device 13 as capable of rotating, and constituting the supplemental conveying device 13 as capable of transferring so that the supplemental conveying device 13 does not interfere with other members on rotatively opening the reaping part 3 in forward direction.COPYRIGHT: (C)2014,JPO&INPIT【課題】刈取部を前方へ回動オープンするときに、補助搬送装置とフィードチェーンとの干渉を防止することができるコンバインを提供する。【解決手段】穀稈を刈り取る刈取部3と、穀稈を脱穀部4へと搬送するフィードチェーン12と、フィードチェーン12の前方に配置され、刈取部3とフィードチェーン12との間に設けられた、補助搬送装置13とを有する搬送部5と、を備え、刈取部3を、フィードチェーン12側を支点に前方へ回動オープン可能とし、刈取部3の刈取第一軸47を格納する刈取第一軸ケース50を脱穀部4の前方に左右水平方向に配置し、刈取第一軸ケース50のフィードチェーン12側の一端と補助搬送装置13とを回動可能に連結するとともに、補助搬送装置13は、刈取部3を前方へ回動オープンした際に、補助搬送装置13と他の部材とが干渉しないように移動可能に構成する。【選択図】図6