PURPOSE: A styrenic resin composition having improved sliding characteristics without reducing heat resistance of resin, further showing extremely improved impact resistance, obtained by adding lignoceric acid myricyl ester to a styrenic resin.

CONSTITUTION: (A) A styrenic resin preferably ABS, HIPS resin, etc., having impact resistance provided by a rubber-like material having 5W50wt% rubber content, optionally containing an antioxidant, metallic soap, antistatic agent, a lubricant, a plasticizer, etc., is blended with (B) 0.5W10wt%, preferably 1W7wt% based on 100pts.wt. styrenic resin of lignoceric acid myricyl ester such as one purified from a naturally occurring substance containing a com pound sown by the formula (R1 is 18W26C alkyl, R2 is 24W32C alkyl) or mixed in polymerization of the styrenic resin to give the aimed resin composition.