Polyoxymethylene and method of producing same

Polyoxymethylene, wherein a ratio of a low molecular weight component having a molecular weight of 10,000 or less in a molecular weight distribution is 7.0% or less of the total, and the molecular weight distribution is obtained by measurement by gel permeation chromatography (GPC) using polymethyl methacrylate (PMMA) as a standard substance, and wherein a weight average molecular weight (Mw) measured by the measurement is 750,000 or more, and the polyoxymethylene comprises 0.5 mass ppm or more of boron atoms, 5 mass ppm or more of fluorine atoms, 0.5 ppm or more of chlorine atoms, or 0.5 ppm or more of sulfur atoms.