A connection apparatus for connecting a battery module and an electronic device is for connecting a battery module in which a plurality of electric cells are arranged in a line and are connected to each other, and an electronic device arranged on a side of the battery module. The connection apparatus includes: a connection bus bar in which a welding plate to be connected to a connection electrode in the battery module is provided at one end, and the other end portion to be connected to a connecting portion of the electronic device is provided at the other end; and an insulating cover that is made of a synthetic resin and is attached to a lower face of the connection bus bar.