NOVELTY - An active material contains a titanium composite oxide. The titanium composite oxide includes monoclinic ( beta )-type titanium composite oxide as main phase. When the main peak integral intensity of the monoclinic ( beta )-type titanium composite oxide with respect to wide angle X-ray diffraction method having copper K( alpha )-rays as the X-ray source is 100, the relative value of the integral intensity of the main peak occurs at 2( theta ) (25.1-25.5 degrees ) attributed to at least one sub phase chosen from anatase-type titanium oxide and hydrogen octatitanate is 30 or less.    USE - Active material is used for nonaqueous electrolyte battery for battery pack (both claimed). Uses include but are not limited to digital camera, electric vehicle, four-wheeled hybrid electric vehicle, two-wheeled vehicle and bicycle.    ADVANTAGE - The nonaqueous electrolyte battery containing the active material has high capacity and excellent large current characteristic.    DETAILED DESCRIPTION - An active material contains a titanium composite oxide. The titanium composite oxide includes monoclinic ( beta )-type titanium composite oxide as the main phase. When the main peak integral intensity of the monoclinic ( beta )-type titanium composite oxide with respect to wide angle X-ray diffraction method having copper K( alpha )-rays as the X-ray source is 100, the relative value of the integral intensity of the main peak that occurs at 2( theta ) (25.1-25.5 degrees ) attributed to at least one sub phase chosen from anatase-type titanium oxide and hydrogen octatitanate is 30 or less. The titanium composite oxide has crystallite diameter of 5 nm or more calculated from the main peak of the monoclinic ( beta )-type titanium composite oxide obtained with the wide angle X-ray diffraction method. INDEPENDENT CLAIMS are included for the following:    (1) nonaqueous electrolyte battery; and    (2) battery pack.    DESCRIPTION OF DRAWING(S) - The drawing shows sectional view of the flat-type nonaqueous electrolyte battery.    Flat-shaped winding electrode group (1)    Bag-like cladding material (2)    Negative electrode material (6)    Positive electrode material (7)