Optical apparatus

An optical apparatus that generates a magnified virtual image of an image, the optical apparatus comprising:

• a display that outputs image light for forming the image;
• an optical system that magnifies the image, the optical system having a first transmissive/reflective surface and a second transmissive/reflective surface that are arranged on an eye point side and a display side, respectively, on an optical axis of the optical system,
• each of the first transmissive/reflective surface and the second transmissive/reflective surface transmitting or reflecting at least a part of the image light;
• and
• a moving device that moves the first transmissive/reflective surface along the optical axis with respect to the second transmissive/reflective surface, the moving device including
• a first holder that holds the display and the second transmissive/reflective surface,
• a second holder that holds the first transmissive/reflective surface and is supported to be able to be driven with respect to the first holder, and
• a cover that accommodates the first transmissive/reflective surface between the cover and the first holder, wherein
• the second holder has a hole portion and a groove portion that communicate with a space between the cover and the first transmissive/reflective surface and a space between the first transmissive/reflective surface and the second transmissive/reflective surface, and/or a gap with the cover.