The present invention has been made in view of the above problems, it is an object of the present invention to provide an air conditioner which is provided with a preliminary mounting portion provided at the front portion of a traveling gas, an operating portion provided at the rear of the preliminary mounting portion, The exhaust gas is prevented from moving toward the operator of the operation section and the exhaust gas from the exhaust pipe is discharged to the outside through the entirety of the exhaust pipe, It is difficult to deposit mud. The exhaust pipe XP passes obliquely upward between the threshing device 4 and the collecting part 5 from the exhaust discharge pipe 67A of the engine 60 and the exhaust outlet 70C of the exhaust pipe XP is discharged from the exhausted rice straw And an exhaust structure disposed above the treatment section 8 (54). The present invention also provides a driving apparatus for a traveling vehicle, comprising a pre-loading unit provided in a front portion of a running vehicle, an operating unit provided in the rear of the pre-loading unit, a threshing unit juxtaposed laterally in the rear of the driving unit, The exhaust structure of the combine having the exhaust pipe for exhausting the exhaust gas from the engine installed in the downward direction is hard to move the exhaust gas toward the operator of the operation section and makes it difficult for the rice straw scum or mud to accumulate over the entire exhaust pipe. The exhaust pipe XP is passed obliquely upward between the threshing device 4 and the recovery part 5 from the exhaust part 67 of the engine 60 and is supported by the housing 4S constituting the threshing device 4 And the exhaust structure was made. It is also an object of the present invention to provide a hydraulic circuit of a hydraulic cylinder for lifting and lowering a cut-off portion in a compact manner, so as to make it easy to avoid dust adhesion of the operation valve. A working oil tank 132 is atta
