The present invention relates to a harrow for a tractor including a breakage prevention unit, more specifically to: a harrow for a tractor including a breakage prevention unit for preventing the breakage of the harrow when the tractor is moving backward with a harrow body touching the surface of the ground by rotating the harrow body to the front side of the tractor using the friction between the harrow body and the surface of the ground. The tractor including the breakage prevention unit of the present invention comprises the following: a supporting frame including a tractor connection bar connected to the rear side of the tractor from left to right sides of the tractor, a pair of rotation bars with one ends connected to the tractor connection bar to the direction where the rotation bars are lifted to be rotated, and a horizontal supporting bar connected to the other ends of the rotation bars to be in parallel with the tractor connection bar； a harrow connection vertical bar with the upper side connected to center of the horizontal supporting bar or the location which is symmetrical to the center of the horizontal supporting bar； a harrow body including multiple harrow blades on the lower side, and connected to the lower side of the harrow connection vertical bar to be in parallel with the horizontal supporting bar； and the breakage prevention unit rotating the harrow body to the front side of the tractor using the friction between the harrow body and the surface of the ground when the tractor is moving backward with the harrow body touching the surface of the ground. The breakage prevention unit includes a hinge shaft connecting the upper side of the harrow connection vertical bar to the horizontal supporting bar to be rotated for rotating the harrow body to forwards and backwards.본 발명은 파손방지수단이 구비된 트랙터용 써레에 관한 것으로, 보다 상세하게는 써레몸체가 지면과 접촉된 상태에서 트랙터가 후진하는 경우 상기 써레몸체가 지면과의 마찰력에 의해 상기 트랙터의 전방으로 회동되도록 구성하여 써레의 파손을 방지하는 파손방지수단이 구비된 트랙터용 써레에 관한 것이다.본 발명에 따른 파손방지수단이 구비된
