To provide a decoration sheet material attached to a trim body or formed integrally with a trim base material and capable of absorbing VOC in adhesive and reducing VOC concentration in a vehicle interior part by taking VOC in the vehicle interior part into the decoration sheet material.

A decoration sheet 30 is composed of a laminated body of three layers including a surface layer 31, a cushion layer 32, and a rear surface layer 33. The rear surface layer 33 is constituted by letting VOC adsorbent 33b adhere to a fiber element 33a of a fibrous sheet material. By adopting a configuration that the decoration sheet 30 is integrated with a surface of an interior trim body 20 through adhesive 50 or adhesive 34, VOC in the adhesive 50 and the adhesive 34 is absorbed by VOC adsorbent 33b in the rear surface layer 33 in the decoration sheet 30 and VOC in the vehicle interior part is absorbed by VOC adsorbent 33b in the rear surface layer 33 through the surface layer 31 and the cushion layer 32 to reduce VOC concentration in the vehicle interior part.