| 摘要 |
PROBLEM TO BE SOLVED: To provide a bevel protractor of a simple structure wherein a material to be cut can be cut based on a wall surface of a house. SOLUTION: The bevel protractor contains a reference board B, a guide board G and a connection means C. The reference board B has a reference surface 2a on a side edge of one side. The guide board G has a guide surface 4a on a side edge of one side in a width direction. The connection means C connects the guide board G to the reference board B. A reference surface 2a of the reference board B and a guide surface 4a of the guide board G project in the same direction to a contact surface 4b.
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