Wavelength conversion apparatus, light source apparatus, and projector

A wavelength conversion apparatus comprising:

• a wavelength converter configured to convert a first light into second light, the first light being emitted from a light source, the first light having a first wavelength band, the second light having a second wavelength band different from the first wavelength band;
• a base to which the wavelength converter is fixed;
• a light collector configured to have the first light to enter the wavelength converter;
• a holding part that holds the light collector;
• a rotary driver configured to rotates the holding part around an axis of rotation;
• and a support part that is fixed to the base and rotatably supports the holding part, wherein an optical axis of the light collector is separated from the axis of rotation of the holding part, and the optical axis of the light collector is parallel to the axis of rotation of the holding part wherein the support part includes a first pillar fixed to the base, a first rotary part provided on the first pillar and contacting with the holding part, a second pillar fixed to the base at a first position different from a second position to which the first pillar fixed in a circumferential direction around the axis of rotation, a second rotary part provided on the second pillar and contacting with the holding part, the first rotary part rotates around the first pillar to rotatably support the holding part, and the second rotary part rotates around the second pillar.