The present invention relates to a cutting and harvesting machine in which when a traveling transmission is configured to be operable at a high speed position for traveling, at a standard position for cutting work, and at a low speed position for clothes cutting work, Properly link the transmission.In order to solve this problem, when the standard cutting state is set by the artificial operation member, the transmission unit 18 for the cutting unit is operated to the standard position, and then the traveling transmission 7M is operated to the standard position. When the low-speed cutting state is set by the artificial operation tool, the traveling transmission 7M is operated to the low speed position, and then the transmission 18 for the cutting body is operated to the high speed position.It is another object of the present invention to provide a crawler traveling apparatus in which grounding tread rings can reduce the amount of deposition of clay on the upper tread ring or its supporting structure portion.In order to solve this problem, the grounding tilting wheel 10018 can be pivotally moved upwardly above the grounding tilting wheel 10018 located near the center of gravity 100G of the vehicle in the forward and backward directions, Which is supported by the pivotal balance frame 10027 and which is located near the center of gravity 100G of the ground and which is supported by the pivotal balance frame 10027, Or the upper tread front wheel 10025 is supported on the upper right side.Further, the present invention provides a thresher having a thruster rotatably installed in a feeder and a thresher which feeds a tail end of the cut grain bar into a feed chamber and feeds the feed in a direction along the feed axis of rotation, It is possible to effectively prevent the clogging preventing member from having a function of avoiding the clogging of the clogging and having excellent durability.A stamper 20030 which receives the throat-treated product scattered in the feed
