CONNECTION MODULE

Provided is a connection module for electrically connecting a plurality of power storage modules having a plurality of power storage elements, the connection module including: connection module-side wires; a bus bar that electrically connects the adjacent power storage modules; and an insulation protector having: an arrangement groove which extends along a first direction and in which the connection module-side wires are arranged; and a bus bar holding part that holds the bus bar. The bus bar has: a main body part that extends in the first direction; and extension parts that extend from the main body part in a second direction that intersects with the first direction, and the extension parts are disposed to extend over and across the arrangement groove.