ELECTRODE PLATE FOR POWER STORAGE DEVICE, ELECTRODE GROUP FOR POWER STORAGE DEVICE, AND POWER STORAGE DEVICE

PROBLEM TO BE SOLVED: To provide an electrode plate for a power storage device, an electrode group for a power storage device, and a power storage device that can prevent generation of a crack at an active material layer of the electrode plate.SOLUTION: An electrode plate for a power storage device comprises: generally rectangular active material formation parts 14a, 14c which are arranged side by side in a longitudinal direction with distance from each other and an active layer is formed; a first unformed part 16 which extends in a longitudinal direction from one end of a pair of long sides of electrode plates 11a, 11b and an active material layer is not formed; a second unformed part 17 which extends in a longitudinal direction from the other end of the pair of long sides and an active material layer is not formed; and a third unformed part 18 which extends in a width direction between adjacent active material formation units 14a, 14c and an active material layer is not formed. The length in the longitudinal direction of the third unformed part 18 is characterized by consecutively changing compared with the adjacent third unformed part 18.