A joint connector includes one or more connecting units, in which one of the connecting units includes: a plurality of conductors; and a housing that holds the plurality of conductors, the conductor includes: trunk portions each of which having first ends and second ends; and branch portions each of which diverging from the trunk portion, the branch portion includes an output terminal portions, the housing includes: a first coupling portion disposed on a side of the first end; and a second coupling portion disposed on a side of the second end, and the first coupling portion of one of the housings and the second coupling portion of another one of the housings are coupled each other, causing the first end of the conductor and the second end of another one of the conductors to be connected to each other.