The present invention relates to a transmission of an agricultural operation vehicle. The transmission comprises: an input shaft a first driving shaft which is separated from the input shaft in a first axial direction a second driving shaft which is separated from the first driving shaft in a second axial direction which is perpendicular to the first axial direction, and is arranged on the same line as the first driving shaft a first power transmission unit which is combined with the input shaft to rotate together with the rotation of the input shaft a first peripheral speed unit which is installed on the first driving shaft and performs a first transmission on the driving transferred through the first power transmission unit to output the first transmission to the first driving shaft a forward and backward transmission unit which is separated from the first peripheral unit in the second axial direction, is installed on the first driving shaft, and performs a forward and backward transmission operation with respect to the driving transferred through the first driving shaft after the first driving is performed a second power transmission unit which is separated from the first power transmission unit in the second axial direction, is installed to be able to rotate on the input shaft, and rotates by the driving transferred through the forward and backward transmission unit a carrier which has one side combined with the first driving shaft to be able to rotate and the other side connected to the second driving shaft to rotate the second driving shaft and a sub-transmission unit which is installed on the carrier, performs a second transmission on the driving performed in the first and forward and backward directions, and outputs the second transmission to the carrier.COPYRIGHT KIPO 2017본 발명은 입력축, 상기 입력축으로부터 제1축방향으로 이격되어 배치된 제1구동축, 상기 제1구동축으로부터 상기 제1축방향에 대해 수직한 제2축방향으로 이격되어 상기 제1구동축과 동일선 상에 배치된 제2구동축, 상기 입력축이 회전함에 따라 함께 회전하도록 상기 입력축에 결합된 제1동력전달부, 상기 제1구동축에 설치되어서 상기 제1동력전달
