To provide a joint connector with a fuse system enabled to reduce the kind of power distributors even quality or number of superimposed load differs in the kind of vehicles, and to prevent or restrict a compulsion of design change even when quality or number of superimposed load is changed by the addition or change of specification.

The joint connector comprises first connection terminal parts 2a connected to the end part of an electric wire material at first connection body side, second connection terminal parts 2b connected to the end part of an electric wire material at second connection body side, both side terminal connection parts 2c, 2d, 2g, 2h and 2i, connecting both terminal parts 2a, 2b so as to make them possible to conduct electricity to each other, and same side terminal connection parts 2e, 2f connecting the first connection terminal parts 2a mutually, and connecting the second connection terminals 2b mutually so as to make them possible to conduct electricity. Both side terminal connection parts 2c-2i are constructed by the combination of blowout parts 2c, 2d, and bus bar parts 2e-2i, and the bus bar parts 2e-2i are cut or enabled to cut at one or several parts.