PURPOSE:To obtain a developer free from a fog by coating a polymer formed by graft-polymerizing a vinyl monomer or vilyidene monomer with a rubber-like basic polymer on a carrier. CONSTITUTION:A rubber-like copolymer consisting of 50-99wt% conjugate diene or acrylate, 1-50wt% a monomer having 4-500 alkylene oxide group and if necessary 0-49wt% =1 king of copolymerizable vinyl monomer or vinylidene monomer is used as a basic polymer of a graft polymer. Monomers such as alkyl ester of acrylic acid, alkyl vinyl ether, (alkoxy) polyethylene glycol(meth) acrylate, etc. are usable as the vinyl monomer or vinylidene monomer used for graft polymn.
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