To provide member for information recording apparatus which is small in the vibrations generated in high-speed rotation and high-speed movement and has high impact strength, high modulus of elasticity and high loss coefficient.

The member for information recording apparatus, such as a pickup carrier, is obtained by adding 25 pts.wt. radical reactive compound of ≤1,000 in molecular weight to 100 pts.wt. 8-ethyl-tetracyclo[4,4,0.12,5.17,10]- dodeca-3-en which is subjected to ring opening polymerization then to hydrogenation (hydrogenation rate 99.8%) and kneading the mixture to obtain a polymer component and molding this composition by injection molding.