BATTERY AND MANUFACTURING METHOD OF BATTERY

A battery is provided in which a reliability of the caulked part vicinity of the terminal is suitably enhanced. One suitable embodiment of the battery herein disclosed includes a negative electrode electrical collector part includes a penetration hole into which the negative electrode terminal is inserted, and the penetration hole includes a taper part including an inclination for making an inner diameter become gradually larger along the insertion direction. Here, the negative electrode terminal is caulked on the taper part in a state of being arranged in the penetration hole, an outer circumference smoothing part including a step difference is formed at the outer circumferential edge on the caulked part, and a join part exists at which the outer circumference smoothing part and the edge part of the penetration hole are joined.