PROBLEM TO BE SOLVED: To provide a head-feeding combine harvester capable of suppressing a lower lip plate from being deformed to a lateral outside with respect to a threshing side wall.SOLUTION: In a head-feeding combine harvester, a handling port 16 of a thresher 6 is formed of an upper lip plate 14 and a lower lip plate 15, and the lower lip plate 15 is supported by a threshing lower side plate 17 constituting a lateral side part of the thresher 6. The combine-harvester comprises suppression plates 18 and 19 disposed on the lateral outer side of the lower lip plate 15 for suppressing the deformation of the lower lip plate 15 to the lateral outer side. The suppression plates 18 and 19 are supported by the threshing lower side plate 17.SELECTED DRAWING: Figure 3
