To prevent misalignment in a micron order due to thermal distortion of an adhesive which adheres and fixes a precision member such as a lens to a holding member.

When a precision member 1 such as an optical member of a lens or the like or an electronic member of an optical sensor is to be fixed with an adhesive 3 to a holding member 2, an acrylic elastic adhesive or the like having the following properties is selected and used as the adhesive 3. The adhesive used shows 10 MPa inner stress generated by the temperature change on the adhesion interface with the objective body and calculated on the basis of the difference in the coefficient of thermal expansion, and shows ≤1.0% shrinkage by hardening of the hardened adhesive after the adhesive is hardened.