Provided in this invention is an impact absorber composition comprising a copolymer containing an aromatic vinyl compound, wherein the peak of tan δ of the copolymer obtained from the measurement of the dynamic viscoelasticity is in the range of more than 0° C. to 20° C. or less, the value of tan δ is 0.4 or more in the whole temperature range of 5° C. to 15° C., and the value of tan δ at 15° C. is 0.5 or more.