Combine harvester

The invention provides a combine harvester which is reduced in the number of connecting components of an engine body frame and an auxiliary reaping device, and is reduced in the number of maintenance and overhaul operation, and deformation of the engine body frame is prevented. The project is solved through the following scheme. A plurality of elevating frames (95, 96, 97) which support the auxiliary reaping device and make the auxiliary reaping device elevates on an up-down direction on the engine body frame (2) on a left-right direction at specified interval. An installing frame (110) which supports the rear part of the elevating frame (95) on a threshing device (4) in the elevating frames (95, 96, 97) on the front part of a left side front frame (15) of the engine body frame (2) is provided. The installing frame (110) comprises a first installing frame (111) which is installed on the front part of the left side front frame (15) and extends on a front-back direction, and a third installing frame (113) which connects the front part of the first installing frame (111) and the front wall (4A) of the threshing device (4).