Method for purifying tetrahydrofuran compound

Provided is a method for purifying industrially useful tetrahydrofuran (THF) in which the purification load can be reduced and which serves as a starting material for manufacturing a polyether polyol having excellent hue, by converting 2,3-hydroxyfuran (2,3-DHF) in THF to an irreversible component which does not return to 2,3-DHF even when concentrated and which can be more easily separated and removed than 2-hydroxytetrahydrofuran. The present invention relates to a method for purifying THF, comprising bringing a starting material THF into contact with an acid catalyst, converting 2,3-DHF to a high-boiling compound, and separating the high-boiling compound by distillation, wherein the moisture content in the starting material THF or a liquid phase in a reactor is 4900 wtppm or less. The present invention also relates to a method for manufacturing purified THF, comprising adding a compound containing a hydroxyl group to a starting material THF and converting 2,3-DHF to a high-boiling compound in the presence