To provide a deburring device allowing easy fine adjustment of the tip position of a grinding tool.

In the deburring device 1, a tool 11 is attached at the tip of an arm 2 of an articulated robot, and the tool 11 supports the grinding tool 15. The deburring device 1 includes a front plate 6 to which the tool 11 is detachably connected, a middle plate 5, and a rear plate 3 attached to the tip of the arm 2. The rear plate 3 includes a first elongated hole 3a whose major axis lines either one of the vertical direction or the lateral direction, and the fixing position of the middle plate 5 with respect to the rear plate 3 can be finely adjusted using the first elongated hole 3a. The front plate 6 includes a second elongated hole 6a whose major axis lines the other one of the vertical direction or the lateral direction, and the fixing position of the front plate 6 with respect to the middle plate 5 can be finely adjusted using the second elongated hole 6a.