VEHICULAR CIRCUIT BODY

A vehicular circuit body provided in a vehicle includes a trunk line that extends in at least a front-and-rear direction of the vehicle, a plurality of control boxes that are provided in the trunk line, and a branch line that directly or indirectly connects a control box to an accessory. The trunk line includes a power source line having a predetermined current capacity and a communication line having a predetermined communication capacity. The branch line includes a communication line having a predetermined communication capacity. The communication line of the trunk line has a transmission path for an optical signal. The communication line of the branch line has a transmission path for an electric signal.