Patent ID: 8591085

Claim:
An optical fiber light source apparatus, comprising: a casing; a discharge lamp accommodated inside the casing; a concave reflection mirror, that holds the discharge lamp; and an optical fiber, configured to receive light from the concave reflection mirror, wherein: the concave reflection mirror is held by a holding member, the holding member has flange portion in a front face of the holding member, the flange portion including an engaging area, a regulating concave portion is formed in a side of the flange portion, a guide is provided on the casing in a direction perpendicular to an optical axis, the guide being complementary to the engaging area of the flange portion so that the flange portion of the holding member is slidably engaged with the guide, and a pressing member, that is pressed with a bias force toward the regulating concave portion of the flange, is provided on the guide and is configured to engage the regulating concave portion.