A non-aqueous electrolyte battery includes a positive electrode, a negative electrode and a gel non-aqueous electrolyte, wherein at least one of the positive electrode and the negative electrode has an active material layer containing an ambient temperature molten salt and polyvinylidene fluoride; the ambient temperature molten salt and the polyvinylidene fluoride are complexed; the non-aqueous electrolyte contains one or more kinds of a non-aqueous solvent having a relative dielectric constant of 20 or more; and the content of the solvent having a relative dielectric constant of 20 or more in the non-aqueous electrolyte is 60% by mass or more relative to the whole of the non-aqueous solvent.