The present invention provides a device for segmenting a bone, comprising a support block (100) with recesses (108-116) and a guide block (200) with holes (204-212), in slideable connection, the guide block having a wedge (214) with a cutter receiving opening (216). The bone is segmented in two cuts i.e. an initial cut and a final cut. While segmenting the bone, the support block is clamped to the bone directly or with the help of a block attached to the bone. An initial cut is taken after the clamping is performed. By aligning different recesses and holes, the guide block is then moved to a predetermined length and the final cut is taken. Thus, the device enables an accurate length of cut to be taken while segmenting the bone. The device also enables varied length of cuts to be taken while segmenting the bone.
