An object of the present invention is to provide a combine that can easily avoid dust attachment of the internal quality measurement device. Moreover, the subject of this invention is providing the combine which can effectively prevent the temperature rise of an internal quality measuring device, arrange positioning an internal quality measuring device in the front part of a grain tank. Moreover, the subject of this invention is providing the combine which can measure the internal quality of a grain with a small internal quality measuring device, and can raise the detection precision by an internal quality measuring device. The measurement chamber 70 in a state partitioned from the grain storage space 10b of the grain tank 10 is provided inside the side wall 10F of the grain tank 10. The internal quality measuring device 40 is disposed in the measurement chamber 70. Moreover, it is equipped with the cooling fan which supplies engine cooling wind to a traveling body horizontally inward direction, and the grain tank 10 arrange positioned at the back of an engine. In the front part of the grain tank 10, the measurement chamber 70 of the state opened to the traveling body front direction is provided, and the internal quality measuring apparatus 40 which measures the internal quality of a grain is arrange positioned in the measurement chamber 70. Doing. A suction port 76 having a housing 74 that houses a detection unit and a measurement control unit in the internal quality measurement device 70, into which a control unit cooling wind for cooling the measurement control unit can be introduced, and the control unit cooling. The outlet 77 which can discharge air is provided. The suction port 76 is provided in the site part near the traveling body horizontal outer side among the housing 74. As shown in FIG. Moreover, the sampling part 50 which samples a part of the grain supplied to the grain tank 10 as a measurement object of the internal quality measuring device 40, an
