To provide a polyoxymethylene resin composition which is used in a part in direct contact with a bio-diesel fuel and excels in bio-diesel fuel resistance, and its molded part.

The polyoxymethylene resin composition comprises (A) 100 pts.wt. polyoxymethylene, (B) 0.01-2.0 pts.wt. antioxidant, and (C) (C-1) 0.01-2.0 pts.wt. hindered amine light stabilizer and/or (C-2) 0.01-2.0 pts.wt. at least one of hydrotalcites to be represented by formula (1): [(M2+)1-x(M3+)x(OH)2]x+[(An-)x/n mH2O]x-.