The invention relates to an insertion sowing type paddy field operation machine. The insertion sowing type paddy field operation machine is provided with a powder supplying device above a back pedal at the back part of the body. Furthermore when a cross side part at the right side or the left side of the powder supply device is provided with a blower fan, a guide pipe which guides high-temperature air next to an engine to the blower fan is approximately configured. The insertion sowing type paddy field operation machine is characterized in that the guide pipe (36) is connected with the blower fan (14) in a manner of bestriding the engine which is equipped on the body; the blower fan (14) sucks the high-temperature air next to the engine through the guide pipe (36). The guide pipe (36) is configured to pass through outside of the cross side part of the back padel (33) in a vertical direction and furthermore enters the lower side of the back padel (33).