An antistatic agent for an ABS resin includes an ionically bonded salt where R1 is a substituted or unsubstituted straight, branched or cyclic C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group+ or a substituted or unsubstituted C7 to C30 arylalkyl group, A is a straight or branched C2 to C4 alkylene group, n is an integer from 0 to 50, and Q1 is a secondary or tertiary ammonium ion, or where R2 is a substituted or unsubstituted straight, branched or cyclic C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C7 to C31 arylalkyl group, A is a straight or branched C2 to C4 alkylene group, and Q2 is a secondary or tertiary ammonium ion.