PROBLEM TO BE SOLVED: To provide a head-feeding combine harvester capable of ensuring a large roll-over angle and having excellent stability without causing enlargement of a machine body.SOLUTION: A threshing apparatus 6 is equipped with a threshing cylinder 41 rotated and driven with power from an engine 3, a receiving net 42 for covering the side of the lower part of the threshing cylinder 41 from the lower side, and an ear tip guide plate 74 for guiding the ear tip side of reaped grain culms transported with a reaping transporting apparatus 5 between the threshing cylinder 41 and the receiving net 42. The head-feeding combine harvester is composed so as to transmit the power from the engine 3 from a first transmission mechanism 49 equipped with bevel gears 79 and 80 through a second transmission mechanism 50 provided with a transmission belt 89 to the threshing cylinder 41. The first transmission mechanism 49 is arranged on the lower side of the ear tip guide plate 74.COPYRIGHT: (C)2009,JPO&INPIT【課題】 機体の大型化を招くことなく、大きい転倒角を確保できる安定性に優れた自脱型コンバインを提供する。【解決手段】 脱穀装置6に、エンジン3からの動力で回転駆動される扱胴41と、扱胴41の下部側を下方から覆う受網42と、刈取搬送装置5により搬送された刈取穀稈の穂先側を扱胴41と受網42との間に案内する穂先案内板74とを備え、エンジン3からの動力を、ベベルギヤ79,80を備えた第1伝動機構49から伝動ベルト89を備えた第2伝動機構50を介して扱胴41に伝達するように構成し、第1伝動機構49を穂先案内板74の下側に配備してある。【選択図】 図10