The present invention includes a stationary member, a movable member, a holding member, and a driving member. The stationary member has a stationary-side spherical surface. The movable member has a movable-side spherical surface. The stationary-side spherical surface and the movable-side spherical surface together forms a gap. The stationary-side spherical surface and the movable-side spherical surface are interposed with a sealant, which seals the gap. Consequently, the present invention allows smooth adjustment of an angle of a mirror surface, and prevention of water penetrating inside.