1. A phosphor holder that is attached to a holder attachment surface of a light source device, the phosphor holder comprising:a pedestal;
a plurality of phosphor holder attachment surfaces that are provided at a plurality of points on an outer peripheral section of said pedestal and that protrude in a first direction by a predetermined height with respect to surroundings;
a base that is mounted substantially in a center of a surface of said pedestal facing in the first direction;
a motor that is mounted on said base and that has a rotating shaft substantially orthogonal to an in-plane direction of said pedestal;
a phosphor wheel on which a phosphor is formed and that is rotated by said motor; and
a plurality of adjustment shims that are mounted on said plurality of phosphor holder attachment surfaces and that are brought into contact with said holder attachment surface.