A cleaning blade, for use in an image-forming apparatus, which is formed by molding a thermosetting elastomer composition containing a rubber component consisting of acrylonitrile-butadiene rubber, natural rubber, butadiene rubber, styrene-butadiene rubber, isoprene rubber, butyl rubber, chloroprene rubber, acrylic rubber, epichlorohydrin rubber, ethylene propylene rubber, and ethylene-propylene-diene copolymer rubber or a mixture of two or more of the rubbers into a thin plate. An initial contact angle of the cleaning blade to the photoreceptor is set to 10.degree. to 50.degree.. A line pressure of the cleaning blade to be applied to the photoreceptor is set to 0.1 N/cm to 1.5 N/cm.