A nonaqueous electrolyte battery comprising:a positive electrode including a positive electrode active material layer containing a lithium iron manganese phosphate composite having an olivine structure; anda negative electrode including a negative electrode active material layer containing a titanium-containing metal oxide composite,wherein an atomic concentration of manganese is 1 atm % or more and 15 atm % or less in a region from a surface to a depth D of the negative electrode active material layer and the depth D is more than 0 nm and 10 nm or less.