Electricity storage device

A power storage device (100) is provided with: a plurality of power storage cells (21) arranged in an arrangement direction; comprising an upper case (11) and a lower case (12) and accommodates the plurality of power storage cells (21); a bus bar module (30) for electrically connecting the plurality of power storage cells (21); and a cover body (40) disposed between the upper case (11) and the bus bar module (30) so as to be able to come into contact with a part of the upper case (11), the plurality of power storage cells (21) being fixed to the lower case (12), and the bus bar module (30) including a plurality of bus bars (35) connecting external terminals of the power storage cells (21) adjacent in the arrangement direction. The cover body (40) includes a facing portion (41) facing the plurality of bus bars (25), and the facing portion (41) is provided with a protruding portion (42) in contact with the bus bars (25). 本发明提供一种蓄电装置(100)，该蓄电装置(100)具备：在排列方向上排列的多个蓄电单体(21)；包括上部壳体(11)以及下部壳体(12)并收容多个蓄电单体(21)的收容壳体；用于