the rubber component as the vulcanizing agent peroxides are favorable dicumyl peroxide is especially favorable the mixing amount of the vulcanizing agent is favorably 0 5 to 10 parts by mass and more favorably 1 to 5 parts by mass for 100 parts by mass of the rubber component as the softener mineral oil is preferable paraffin oil is most favorable than other mineral oils the mixing amount of the softener is favorably 10 to 100 parts by mass and more favorably 20 to 60 parts by mass for 100 parts by mass of the rubber component titanium oxide carbon black and calcium carbonate are listed as preferable fillers the mixing amount of the filler is favorably 1 to 50 parts by mass and more favorably 10 to 40 parts by mass for 100 parts by mass of the rubber component the above described components are kneaded to form a rubber composition the obtained rubber composition is press vulcanized in a die at 165 to 175 u00b0 c to form a tube cot after the shaft 2 is inserted into the tube the surface of the tube is polished with a cylindrical grinder finally the tube is cut into a desired length to obtain the rubber roller 1 the rubber roller 1 obtained in this manner has the following properties the value of the equation 1 computed from the complex elastic.