To provide a bevel gauge wherein sliding on a material to be cut is effectively suppressed, a stabilized reference position for cutting on the material to be cut is secured, and accurate cutting operation with a cutting tool can be easily carried out.

A bevel gauge has a reference plate B1 having a reference surface along one side of a material to be cut, and a guide plate which is rotatably supported by the reference plate B1, has a guide surface 4a for making the cutting tool along that and is placed on the material to be cut. Non-slip parts 3b and 7 are provided on a surface coming in contact with the material to be cut of the guide plate G1 and G2.