To provide a fixture for building component capable of firmly fixing a building component at an accurate angle position.

The building component fixture for fixing the building component to the predetermined mounting surface comprises a cylindrical connecting section, a male screw section for screwing to a female screw hole formed in the building component is formed in the outer circumferential surface, and an elastic means capable of being press-contacted to the inner circumferential surface of the female screw hole of the building component is provided on the outer circumferential surface of the connecting section.