Rubber covered roll and rubber composition for rubber covered roll

A rubber covered roll comprising a metallic core and at least two covering rubber layers, one of said covering rubber layers being an inner layer in contact with said metallic core and one of said covering rubber layers being an outer surface layer, characterized in that at least one of said covering rubbers layers is a vulcanized rubber layer consisting of a rubber composition comprising an ethylenically unsaturated nitrile-conjugated diene highly saturated copolymer rubber (A) having a conjugated diene unit content of the copolymer chain of at most 25 wt. % and a zinc salt (B) of an ethylenically unsaturated carboxylic acid, wherein the covering rubber layer coming into contact with the metallic core is a vulcanized rubber layer consisting of a rubber composition comprising 100 parts by weight of a rubber component composed of 50-90 wt. % of the highly unsaturated copolymer rubber (A) and 50-10 wt. % of a diene rubber and 10-40 parts by weight of the zinc salt (B), and wherein a covering rubber layer forming the outer surface layer is a vulcanized rubber layer consisting of a rubber composition comprising 100 parts by weight of a rubber component containing at least 50 wt. % of the highly saturated copolymer rubber (A) and 10-80 parts by weight of the zinc salt (B), and wherein the proportion of the zinc salt (B) contained in the rubber composition forming the outer surface layer is relatively higher than in the rubber composition forming the inner layer.