To obtain the subject composition satisfying tensile elongation, repeated impact and hinge characteristics at a low temperature by bringing the composition to contain a specific copolymer and a specific polymer.

This polyoxymethylene copolymer composition is brought to contain 100 pts.wt. of (A) a polyoxymethylene copolymer containing a hydroxyalkyl(HA) group on the molecular end and ≥5×10-5 mole terminal HA group concentration per 1 mol of the oxymethylene unit and 1-100 pts.wt. of a modified α-olefin copolymer. As the ingredient A, a copolymer and the like having 10000-500000 number average molecular weight and expressed by formula I [the part except A is a hydrogen-added liquid polybutadiene residue and the like hydroxyalkylated on both ends and having 500-10000 number average molecular weight, m=2-98 mole %, n=2-98 mole %, m+n=100 mole % and m is random or block against n; k=2-6; R is H or the like; A is a copolymer residue having 5000-250000 number average molecular weight and expressed by formula II (R1 is R; j is k; x=95-99.9 %, y=5-0.1 %, x+y=100 %, y is random against x)] are cited.