<p>Disclosed is an electrophotographic toner binder which comprises a silicone-grafted copolymer produced by radical copolymerization of an organopolysiloxane compound represented by the following general formula (I) and another monomer capable of undergoing the radical copolymerization with said organopolysiloxane compound: <CHEM> wherein R<1> represents a hydrogen atom or a methyl group; R<2> represents a divalent hydrocarbon group containing 1 to 12 carbon atoms, which may have one or more of an oxygen atom interposed in its carbon chain; R<3> represents a monovalent hydrocarbon group containing 1 to 6 carbon atoms; m represents 1, 2 or 3; and n represents an integer from 20 to 200.</p>
