The present invention provides a branching unit, the height of which can be reduced, and a vehicular system. The branching unit includes a switch equipped with a fixed electrode and a movable electrode; a first bushing conductor which is connected either to the fixed electrode or to the movable electrode; and a second bushing conductor which is connected to the other of the fixed electrode and the movable electrode. A first T-shaped cable head is connected at one end to the first bushing conductor, a second T-shaped cable head is connected to a different end part of the first T-shaped cable head from the one end, a third T-shaped cable head is connected at one end to the second bushing conductor, the first T-shaped cable head and the second T-shaped cable head are respectively connected to different circuits, and surfaces of the respective T-shaped cable heads and the switch are at a ground potential.