The objective is to suppress the spread of noise without installing a dedicated noise suppression component around the connection parts of busbars. A busbar connection structure includes a connection part and a cover. The connection parts electrically connect a first busbar, which is connected to the circuit of the first device, and a second busbar, which is connected to the circuit of the second device. The cover is for preventing contamination, covering the area including the connection parts. The cover includes a conductive part as a region of a conductor, at least over a range including directly above the connection parts.