A first connector of a battery connector includes a battery-side busbar first terminal including a battery-side first pin insertion hole and a load-side busbar first terminal including a load-side first pin insertion hole. A second connector includes a battery-side busbar second terminal including a battery-side second pin insertion hole and a load-side busbar second terminal including a load-side second pin insertion hole. The load-side first pin insertion hole is formed in a position where the load-side first pin insertion hole does not match the battery-side second pin insertion hole when the battery-side busbar second terminal and the load-side busbar first terminal are superimposed. The load-side second pin insertion hole is formed in a position where the load-side second pin insertion hole does not match the battery-side first pin insertion hole when the battery-side busbar first terminal and the load-side busbar second terminal are superimposed.