A resin composition, comprising: a polyolefin in an amount of from 50% by mass to 90% by mass; an electro-conductive agent; and a compound represented by General Formula below, where in General Formula, 1 and m represent natural numbers, and wherein the compound represented by General Formula has a combination of substituent groups in accordance with one of combinations to, below: a combination in which R is a group having a number average molecular weight of 1,000 or greater and represented by General Formula, Z in General Formula is a methyl group, W 1 and W 2 are an acid anhydride group, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are a hydrogen atom; a combination in which R is an alkyl group having 20 or more carbon atoms, one of W 1 and W 2 is an ether group and the other is atomic bonding, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are a hydrogen atom; a combination in which R is a divalent group derived from polyurethane and having a number average molecular weight of 1,000 or greater, W 1 and W 2 are a urethane group, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are a hydrogen atom; a combination in which R is a divalent group derived from acrylic polymer and having a number average molecular weight of 1,000 or greater, W 1 and W 2 are atomic bonding, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are hydrogen atom, where in General Formula, n represents a natural number. a polyolefin in an amount of from 50% by mass to 90% by mass; an electro-conductive agent; and a compound represented by General Formula below, where in General Formula, 1 and m represent natural numbers, and wherein the compound represented by General Formula has a combination of substituent groups in accordance with one of combinations to, below: a combination in which R is a group having a number average molecular weight of 1,000 or greater and represented by General Formula, Z in General Formula is a methyl group, W 1 and W 2 are an acid anhydride group, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are a hydrogen atom; a combination in which R is an alkyl group having 20 or more carbon atoms, one of W 1 and W 2 is an ether group and the other is atomic bonding, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are a hydrogen atom; a combination in which R is a divalent group derived from polyurethane and having a number average molecular weight of 1,000 or greater, W 1 and W 2 are a urethane group, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are a hydrogen atom; a combination in which R is a divalent group derived from acrylic polymer and having a number average molecular weight of 1,000 or greater, W 1 and W 2 are atomic bonding, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are hydrogen atom, a combination in which R is a group having a number average molecular weight of 1,000 or greater and represented by General Formula, Z in General Formula is a methyl group, W 1 and W 2 are an acid anhydride group, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are a hydrogen atom; a combination in which R is an alkyl group having 20 or more carbon atoms, one of W 1 and W 2 is an ether group and the other is atomic bonding, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are a hydrogen atom; a combination in which R is a divalent group derived from polyurethane and having a number average molecular weight of 1,000 or greater, W 1 and W 2 are a urethane group, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are a hydrogen atom; a combination in which R is a divalent group derived from acrylic polymer and having a number average molecular weight of 1,000 or greater, W 1 and W 2 are atomic bonding, X is an alkylene group having 2 carbon atoms, and Y 1 and Y 2 are hydrogen atom, where in General Formula, n represents a natural number.