Temporarily fixing method of the adhesive composition and components using the same

And the temporary fixing method of a member suitable for processing of optical members, it provides a suitable adhesive composition. (A) a polyfunctional (meth) acrylate, (B) a monofunctional (meth) acrylate, and (C) adhesive composition contains a photopolymerization initiator, the cured product obtained from the adhesive composition adhesive composition, wherein the glass transition temperature of -50 ° C. to 40 ° C.. Further, by bonding a member by using the adhesive composition is temporarily fixed, after processing the tentative fixed member, and immersing the processed member in warm water of 90 ° C. or less, the adhesive composition temporary fixation method of the member, characterized in that removing the cured body of the a member.