A connection member configured to electrically connect respective storage elements to each other in a power storage device constituted by a plurality of storage elements, the connection member comprising: a substrate; and a plurality of connecting portions connectable to electrodes of the respective storage elements and configured to cut off electric connection with the storage elements by fusing at a time when a current of a predetermined value or more flows therein, wherein each connecting portion is formed by performing punching on the substrate and includes: a first extension portion extending in a first direction perpendicular to a punching direction, a second extension portion extending from the first extension portion in a second direction perpendicular to both the punching direction and the first direction, and at least two bent portions (331b, 332b) bent in the punching direction so as to bend away from the substrate; wherein one of the bent portions is formed on the first extension portion, such that the first extension portion is bent along a first width-direction bending line and further bent along a second width-direction bending line, so as to define a step in the punching direction along the first extension portion, and the other one of the bent portions is formed on the second extension portion, such that the second extension portion is bent along a third width-direction bending line and further bent along a fourth width-direction bending line, so as to define a step in the punching direction along the second extension portion. a substrate; and a plurality of connecting portions connectable to electrodes of the respective storage elements and configured to cut off electric connection with the storage elements by fusing at a time when a current of a predetermined value or more flows therein, wherein each connecting portion is formed by performing punching on the substrate and includes: a first extension portion extending in a first direction perpendicular to a punching direction, a second extension portion extending from the first extension portion in a second direction perpendicular to both the punching direction and the first direction, and at least two bent portions (331b, 332b) bent in the punching direction so as to bend away from the substrate; wherein a first extension portion extending in a first direction perpendicular to a punching direction, a second extension portion extending from the first extension portion in a second direction perpendicular to both the punching direction and the first direction, and at least two bent portions (331b, 332b) bent in the punching direction so as to bend away from the substrate; wherein one of the bent portions is formed on the first extension portion, such that the first extension portion is bent along a first width-direction bending line and further bent along a second width-direction bending line, so as to define a step in the punching direction along the first extension portion, and the other one of the bent portions is formed on the second extension portion, such that the second extension portion is bent along a third width-direction bending line and further bent along a fourth width-direction bending line, so as to define a step in the punching direction along the second extension portion.