A power storage device (10) includes a first power storage cell (101), a second power storage cell (102) spaced apart from the first power storage cell (101) in a predetermined direction, a third power storage cell (103) spaced apart from the second power storage cell (102) in the predetermined direction, a conductive member (850), a first spacer (701) disposed between the first power storage cell (101) and the second power storage cell (102), and a second spacer (702) disposed between the second power storage cell (102) and the third power storage cell (103). A first terminal (121b) is provided on the side of a lower surface of the first power storage cell (101). A second terminal (122a, 122b) is provided on the side of a lower surface of the second power storage cell (102). A third terminal (123a) is provided on the side of a lower surface of the third power storage cell (103). The conductive member (850) is connected to the first terminal (121b), the second terminal (122a, 122b), and the third terminal (123a).
