A nonaqueous electrolyte battery comprising: a container member; a positive electrode stored in the container member and containing, as a positive electrode active material, a lithium containing nickel cobalt manganese composite oxide represented by Li 1-x Ni 1-a-b Co a Mn b O 2 (that satisfies -0.2 ≤ x ≤ 0.5, 0 < a ≤ 0.5, and 0 < b ≤ 0.5); a negative electrode stored in the container member, and comprising a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, wherein the negative electrode mixture layer contains a lithium titanium composite oxide having a spinel structure as a negative electrode active material; and a nonaqueous electrolyte stored in the container member, and comprising propylene carbonate as a solvent, wherein a gas composition in the container member when the nonaqueous electrolyte battery is adjusted to a charge ratio of 30% after manufacture, and then left to stand at 35°C for 24 hrs satisfies 0.02 cc / g ≤ V H 2 ≤ 0.1 cc / g 0.05 ≤ V C 3 H 6 / V CO ≤ 0.1 1 ≤ V CO / V H 2 ≤ 9 where V H2 is a hydrogen gas amount (cc) per 1 g of negative electrode mixture layer, V C3H6 is a propylene gas amount (cc) per 1 g of negative electrode mixture layer, and V CO is a carbon monoxide gas amount (cc) per 1 g of negative electrode mixture layer, and wherein V H2, V C3H6, and V CO are measured by gas chromatography using the following analysis conditions for V H2 and V CO: detection is performed using a column (MS5A), an injection temperature of 140°C, a detector temperature of 140°C, Ar as a carrier gas, and a flow rate of 23 ml/min; and the following analysis conditions for V C3H6: detection is performed using a column (Gaskuropack54), an injection temperature of 100°C, a detector temperature of 100°C, He as a carrier gas, and a flow rate of 40 ml/min. a container member; a positive electrode stored in the container member and containing, as a positive electrode active material, a lithium containing nickel cobalt manganese composite oxide represented by Li 1-x Ni 1-a-b Co a Mn b O 2 (that satisfies -0.2 ≤ x ≤ 0.5, 0 < a ≤ 0.5, and 0 < b ≤ 0.5); a negative electrode stored in the container member, and comprising a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, wherein the negative electrode mixture layer contains a lithium titanium composite oxide having a spinel structure as a negative electrode active material; and a nonaqueous electrolyte stored in the container member, and comprising propylene carbonate as a solvent, wherein a gas composition in the container member when the nonaqueous electrolyte battery is adjusted to a charge ratio of 30% after manufacture, and then left to stand at 35°C for 24 hrs satisfies 0.02 cc / g ≤ V H 2 ≤ 0.1 cc / g 0.05 ≤ V C 3 H 6 / V CO ≤ 0.1 1 ≤ V CO / V H 2 ≤ 9 where V H2 is a hydrogen gas amount (cc) per 1 g of negative electrode mixture layer, V C3H6 is a propylene gas amount (cc) per 1 g of negative electrode mixture layer, and V CO is a carbon monoxide gas amount (cc) per 1 g of negative electrode mixture layer, and wherein V H2, V C3H6, and V CO are measured by gas chromatography using the following analysis conditions for V H2 and V CO: detection is performed using a column (MS5A), an injection temperature of 140°C, a detector temperature of 140°C, Ar as a carrier gas, and a flow rate of 23 ml/min; and the following analysis conditions for V C3H6: detection is performed using a column (Gaskuropack54), an injection temperature of 100°C, a detector temperature of 100°C, He as a carrier gas, and a flow rate of 40 ml/min.