In this connecting structure for auxiliary machinery and cable is a connecting structure, a plurality of conductors are surrounded by an insulating covering and arrayed in a flat configuration and an auxiliary machinery that attaches directly to this cable; and characterized in that the auxiliary machinery is provided with a housing being equipped with a board on which electronic components are mounted and to which a specific circuitry pattern has been formed, a connection terminal that is connected to the circuitry pattern on the board and to at least one conductor among the conductors of the cable, and a molded part for sealing the connections between the connection terminal of the housing and the conductors of the cable; and the cable is disposed so as to extend along the outside of the auxiliary machinery.