To improve mold releasability during molding processing to an ultrahigh level without substantially deteriorating mechanical characteristics of a polyacetal resin at all.

A polyacetal resin composition is obtained by adding (B) 0.1-0.2 pt.wt. of at least one kind of compound selected from a fatty acid ester compound and a fatty acid amide compound having 400-800 molecular weight and having 50-80°C melting point and (C) 0.2-0.3 pt.wt. of at least one kind of compound selected from a fatty acid ester compound and a fatty acid amide compound having 400-800 molecular weight in the same manner and having 100-160°C melting point to (A) 100 pts.wt. of the polyacetal resin.