An elastomer composition is prepared that contains a rubber component (A)
containing at least one of diene rubber and EPDM rubber; a mixture
composition (B) containing hydrogenated styrene thermoplastic elastomer
and olefin resin; and a styrene thermoplastic elastomer (C) having double
bonds partly left, wherein the styrene thermoplastic elastomer (C) is
blended at a ratio of not less than 2 parts by weight and not more than
100 parts by weight with respect to 200 parts by weight of the mixture
composition (B), and the rubber component (A) is dispersed by dynamic
crosslinking in the mixture composition (B) having the styrene
thermoplastic elastomer (C) dispersed therein. A rubber roller is formed
by using the elastomer composition. The elastomer composition is
excellent in wear resistance, and the rubber roller made of the elastomer
composition is excellent in wear resistance at the time of idling
rotation.