A nonaqueous electrolyte battery comprising: a positive electrode; a negative electrode; and a nonaqueous electrolyte, wherein the positive electrode comprises: a positive electrode mixture layer comprising positive electrode active material particles comprising Li and at least one transition metal selected from the group consisting of Fe, Mn, Co, and Ni; and a positive electrode current collector comprising at least one surface on which the positive electrode mixture layer is supported; the positive electrode mixture layer comprises a first surface being in contact with the positive electrode current collector and a second surface separated by a thickness of the positive electrode mixture layer from the first surface; the positive electrode mixture layer comprises: a first portion having a thickness of at least 20% of the thickness of the positive electrode mixture layer and comprising the first surface; and a second portion having a thickness of at least 20% of the thickness of the positive electrode mixture layer and comprising the second surface; in the first portion of the positive electrode mixture layer, a first oxide layer is formed on surfaces of the positive electrode active material particles, the first oxide layer comprising at least one element selected from the group consisting of Li, Mg, Ca, B, Al, Si, P, Fe, Mn, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ta, and W, and having a thickness of more than 0.5 nm and 100 nm or less; in the second portion of the positive electrode mixture layer, a second oxide layer is formed on surfaces of the positive electrode active material particles, the second oxide layer comprising at least one element selected from the group consisting of Li, Mg, Ca, B, Al, Si, P, Fe, Mn, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ta, and W, and having a thickness of 0.5 nm or more and less than 100 nm; the thickness of the first oxide layer is more than the thickness of the second oxide layer; and the negative electrode comprises a carbon material as a negative electrode active material. a positive electrode; a negative electrode; and a nonaqueous electrolyte, wherein the positive electrode comprises: a positive electrode mixture layer comprising positive electrode active material particles comprising Li and at least one transition metal selected from the group consisting of Fe, Mn, Co, and Ni; and a positive electrode current collector comprising at least one surface on which the positive electrode mixture layer is supported; a positive electrode mixture layer comprising positive electrode active material particles comprising Li and at least one transition metal selected from the group consisting of Fe, Mn, Co, and Ni; and a positive electrode current collector comprising at least one surface on which the positive electrode mixture layer is supported; the positive electrode mixture layer comprises a first surface being in contact with the positive electrode current collector and a second surface separated by a thickness of the positive electrode mixture layer from the first surface; the positive electrode mixture layer comprises: a first portion having a thickness of at least 20% of the thickness of the positive electrode mixture layer and comprising the first surface; and a second portion having a thickness of at least 20% of the thickness of the positive electrode mixture layer and comprising the second surface; a first portion having a thickness of at least 20% of the thickness of the positive electrode mixture layer and comprising the first surface; and a second portion having a thickness of at least 20% of the thickness of the positive electrode mixture layer and comprising the second surface; in the first portion of the positive electrode mixture layer, a first oxide layer is formed on surfaces of the positive electrode active material particles, the first oxide layer comprising at least one element selected from the group consisting of Li, Mg, Ca, B, Al, Si, P, Fe, Mn, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ta, and W, and having a thickness of more than 0.5 nm and 100 nm or less; in the second portion of the positive electrode mixture layer, a second oxide layer is formed on surfaces of the positive electrode active material particles, the second oxide layer comprising at least one element selected from the group consisting of Li, Mg, Ca, B, Al, Si, P, Fe, Mn, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ta, and W, and having a thickness of 0.5 nm or more and less than 100 nm; the thickness of the first oxide layer is more than the thickness of the second oxide layer; and the negative electrode comprises a carbon material as a negative electrode active material.