Connection module including bus bar extending over groove accomodating connection module-side wires

A connection module for electrically connecting a plurality of power storage modules having a plurality of power storage elements, the connection module comprising:

• connection module-side wires;
• a bus bar for electrically connecting adjacent power storage modules;
• and
• an insulation protector including an arrangement groove which extends along a first direction and in which the connection module-side wires are arranged, the insulation protector further including a bus bar holding part that holds the bus bar,
• wherein the bus bar comprises a unitary plate that includes 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.