PURPOSE: To obtain the title composition which has excellent antistatic properties and gives a molded article free from discoloration, by incorporating a specified anionic surface active agent and a dispersing agent into a synthetic resin.

CONSTITUTION: An anionic surface active agent (A) comprising a salt of a 10W18C alkanesulfonic acid or a salt of an alkylbenzenesulfonate of 10W18C alkyl is mixed with a dispersing agent (B) for component A, selected from a polyolefin wax such as polyethylene or polypropylene wax, a circuit ester, montanic acid, and montan wax, in a weight ratio of A to B of 50W95:50W5. 0.5W5.0pts.wt. mixture thus obtained is incorporated into 100pts.wt. synthetic resin such as polyester, polycarbonate, nylon, polyphenylene oxide or PS resin.