The present invention relates to a rear side structure for tractors and, more specifically, to a rear side structure for tractors, wherein: (1) the upper and the lower part connecting links connected to the farm working machinery in the rear side of a tractor to enable operation of the farm working machines are combined to the rear side of a vehicle body frame rather than to a rear axle so that no shocks applied to the farm working machinery are allowed to be conveyed to the rear axle under the condition where the farm working machine is installed at the connecting link； and (2) maintenance and repair of a power take off (PTO) apparatus is possible without replacement of the rear axle upon breakdown of the PTO by separately installing the PTO independent of the rear axle in a dynamometer and a mechanical structure, while shocks are alleviated that may occur by the farm working machine when working with the farm working machine mounted on the rear side using PTO power through installation by fixing the PTO onto the upper and the lower part connecting links combining part of a vehicle body frame with inclusion of buffering members； and (3) buffering cylinders are installed on the left and right sides for buffering between the rear axle and the vehicle body frame while the rear side of the vehicle body frame can be simply raised up or lowered using the buffering cylinders when the tractor is stopped, and a raising or lowering extent of the vehicle body frame can be visually checked by an operator so that movement and operation execution of a tractor can be conveniently and smoothly realized.본 발명은 트랙터의 후방 구조에 관한 것으로서, 보다 상세하게는 ①트랙터 후방에서 작업기를 연결시켜 상기 작업기가 작업이 가능하게 하는 상부 및 하부 연결링크를 후차축에 결합하지 않고 차체 프레임의 후방에 결합하도록 하여 상기 연결링크에 작업기가 설치된 상태에서 상기 작업기에 충격이 가해지더라도 후차축으로 전달되지 않도록 하고, ② 동력인출장치 (PTO, Power take off)를 상기 후차축과는 동력계및 기계적인 구조에서 별도로 독립하여 설치함으로써 상기 동력인출장치(PTO)의 고장 시 상기 후차축의 교체 없이 유지보수가 가능하고, 상기 동력인출장치(PTO)를 상기 차체 프레임인 상부 및 하부 연결링크 결합부에 완충부재를 개재하여 고정 설치함으로써 동력인출장치(PTO) 동력으
