PURPOSE: To obtain a styrene resin compsn. which is excellent in antistatic properties and thermal stability and gives a molded article resistant to cleavage by compounding a styrene resin with a specific polyamide elastomer in a specified wt. ratio.

CONSTITUTION: The compsn. is prepd. by compounding 70-95wt.% styrene resin (e.g. PS) with 5-30wt.% polyamide elastomer which comprises a polyamide segment formed by the polycondensation of a diamine, a dicarboxylic acid, and an aminocarboxylic acid and consisting of polyamide blocks of formulae I and II (wherein R1 and R2 are each a divalent hydrocarbon group provided at least one of them is an arom hydrocarbon group; R3 is a 5-11C divalent hydrocarbon group; and n1 and n2 are each 1-20) in a molar ratio of the polyamide block of formula II to that of formula I of 0-10, a polyoxyalkylene segment contg. at least 50wt.% polyoxyethylene and having a number-average mol.wt. of 500-6,000, and a linking agent (a dicarboxylic acid, a diamine, or a diisocyanate) for linking the above two kinds of segment in a wt. ratio of the sum of the polyamide segment and the linking agent to the polyamide elastomer of 20-70wt.%.