Projector

A projector comprising:

• a lamp case made of resin in which a light source lamp is fitted;
• and
• an optical part holder made of metal in which an optical part is fitted;
• wherein
• the lamp case includes a positioning boss,
• the optical part holder includes:
• a lamp case holder made of resin which accommodates the lamp case;
• a tubular light tunnel which shapes a form of light emitted from the light source lamp;
• a cylindrically shaped portion having a guide hole into which the positioning boss is inserted;
• and
• a detent member being resiliently deformable,
• a light-tunnel fixing member made of metal is attached to the optical part holder, the light-tunnel fixing member fixing the light tunnel to the optical part holder,
• the detent member is substantially U-shaped and is provided integrally on the light-tunnel fixing member so as to be disposed at a position corresponding to the cylindrically shaped member,
• the cylindrically shaped portion has a slot portion into which the detent member is inserted and which extends from an outer peripheral surface of the cylindrically shaped portion to the guide hole, and
• the positioning boss has a concave engaging portion which is engaged with the detent member when the positioning boss is inserted in the guide hole.