A gamma-butyrolactone composition, comprising: gamma-butyrolactone; and a nitrogen-containing compound, wherein the content of the gamma-butyrolactone is 99.0% by mass or more, the nitrogen-containing compound is an amide compound represented by the following formula and having a molecular weight of 1,000 or less, in which the difference between the boiling point of the amide compound at atmospheric pressure and the boiling point of the gamma-butyrolactone at atmospheric pressure is within 50 °C: wherein R 1 to R 3 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an alkoxy group, a hydroxyl group, an amino group, an amide group, an alkylthio group, an arylthio group, an alkylcarbonyl group or an arylcarbonyl group; these groups may each further have a substituent; a hetero atom may be contained in the substituent; at least one of the substituents R 1 to R 3 is an alkylcarbonyl group or an arylcarbonyl group; and two groups selected from R 1 to R 3 may be bonded to each other to form a ring, provided that a sum total of the carbon atom number of R 1 to R 3 is 1 or more and 50 or less, or a mixture of two or more thereof, the total content of the nitrogen-containing compound is 0.1 ppm by mass to 1,000 ppm by mass as converted to a nitrogen atom. gamma-butyrolactone; and a nitrogen-containing compound, wherein the content of the gamma-butyrolactone is 99.0% by mass or more, the nitrogen-containing compound is an amide compound represented by the following formula and having a molecular weight of 1,000 or less, in which the difference between the boiling point of the amide compound at atmospheric pressure and the boiling point of the gamma-butyrolactone at atmospheric pressure is within 50 °C: wherein R 1 to R 3 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an alkoxy group, a hydroxyl group, an amino group, an amide group, an alkylthio group, an arylthio group, an alkylcarbonyl group or an arylcarbonyl group; these groups may each further have a substituent; a hetero atom may be contained in the substituent; at least one of the substituents R 1 to R 3 is an alkylcarbonyl group or an arylcarbonyl group; and two groups selected from R 1 to R 3 may be bonded to each other to form a ring, provided that a sum total of the carbon atom number of R 1 to R 3 is 1 or more and 50 or less, or a mixture of two or more thereof, wherein R 1 to R 3 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an alkoxy group, a hydroxyl group, an amino group, an amide group, an alkylthio group, an arylthio group, an alkylcarbonyl group or an arylcarbonyl group; these groups may each further have a substituent; a hetero atom may be contained in the substituent; at least one of the substituents R 1 to R 3 is an alkylcarbonyl group or an arylcarbonyl group; and two groups selected from R 1 to R 3 may be bonded to each other to form a ring, provided that a sum total of the carbon atom number of R 1 to R 3 is 1 or more and 50 or less, or a mixture of two or more thereof, the total content of the nitrogen-containing compound is 0.1 ppm by mass to 1,000 ppm by mass as converted to a nitrogen atom.