Projection lens and projector

A projection lens comprising:

• a plurality of lens groups each formed of at least one lens;
• and
• a lens barrel adapted to support each of the lens groups from an outer circumferential side,
• wherein the lens barrel includes
• a first lens group holding barrel adapted to hold a first lens group located on an extreme enlargement side from the outer circumferential side,
• a final lens group holding barrel adapted to hold a final lens group located on an extreme reduction side from the outer circumferential side,
• an outer barrel adapted to hold the first lens group holding barrel and the final lens group holding barrel from an outer circumferential side,
• a first temporarily holding mechanism adapted to allow the first lens group to be displaced in a direction perpendicular to an optical axis,
• a first adhesive adapted to bond the first lens group holding barrel and the outer barrel to each other to make the first lens group unable to be displaced,
• a second temporarily holding mechanism adapted to allow the final lens group to be displaced in a direction perpendicular to the optical axis, and
• a second adhesive adapted to bond the final lens group holding barrel and the outer barrel to each other to make the final lens group unable to be displaced.