A battery includes: an electrode stacked body; a battery case that accommodates the electrode stacked body; positive and negative electrode terminals that are provided so as to communicate inside and outside of the battery case with each other; a lead that electrically connects tabs of the electrode stacked body to the electrode terminals; and an insulated lead insulating cover in which a space is formed so that the lead enters and a terminal through-hole is formed so that one end of the electrode terminal enters the space therethrough. An insulated lead insulating cover includes a first cover component and a second cover component that cooperatively form the space and the terminal through-hole with each other, and the first cover component and the second cover component respectively include engagement portions engaging removable with each other.