POWER STORAGE DEVICE

A power storage device (2) includes: a plurality of power storage cells (29); and a first heat exchanger (32A) and a second heat exchanger (32B) that cool the plurality of power storage cells (29) and extend in an extension direction. The first heat exchanger (32A) includes: a first heat medium path (53A) that extends in the extension direction and allows a heat medium to flow in the first heat exchanger (32A); and a first recess (71A) formed to decrease a flow path area of the first heat medium path (53A). The second heat exchanger (32B) includes: a second heat medium path (53B) that extends in the extension direction and allows the heat medium to flow in the second heat exchanger (32B); and a second recess (71B) formed to decrease a flow path area of the second heat medium path (53B). A depth of the first recess (71A) is different from a depth of the second recess (71B).