Busbar holding structure

A busbar holding structure for holding, to a wires routing body made of an insulative resin, at least one busbar of plural busbars for electrically connecting plural cell batteries constituting a battery assembly to each other, the busbar holding structure comprising:

• a wires routing portion configured to house a plurality of electric wires;
• a bottom wall on which the at least one busbar is mounted;
• a partition wall erected from a portion of a peripheral edge of the bottom wall and connected to the wires routing portion;
• a lock portion provided on the partition wall and configured to lock a side end portion of the at least one busbar on the wires routing body;
• and
• a first projection that projects perpendicularly from the bottom wall and is to be fitted in a through-hole provided in the at least one busbar, wherein
• a fitting gap between the first projection and the through-hole is set so as to restrict an inclination angle of the at least one busbar with respect to the first projection and to thereby prevent the at least one busbar from being unlocked from the lock portion, and
• the bottom wall is cantilevered to the partition wall.