PURPOSE: A plow apparatus for a tractor is provided to prevent the damage of the apparatus, to improve efficiency of work by alleviating impacts when overload is generated and to buffer a plurality of plow parts through a simple construction. CONSTITUTION: A plow apparatus for a tractor comprises: a mainframe(100) which is connected to the tractor and includes a tractor connection part； a plurality of plow parts(200) which are rotatably installed in the mainframe； a plurality of drive cylinders(300) rotating the plow parts； a cushion cylinder(500) in which one end is fixed to the mainframe and a piston rod is inserted into the other end of the cushion cylinder； and a hydraulic line transferring a fluid pressure by connecting the drive cylinder and the cushion cylinder.전방에 트랙터와 연결되어 견인되는 트랙터 연결부를 구비하는 메인 프레임과, 상기 메인 프레임에 회동 가능하게 설치되는 복수의 쟁기부와, 상기 쟁기부 각각을 상하 회동시키는 복수의 작동 실린더와, 상기 작동 실린더 각각을 직선 왕복운동시키도록 유압을 제공하는 한 쌍의 유압라인을 포함하는 트랙터용 쟁기장치를 기재한다.
