Provided is a branch connector that can maintain waterproofness with respect to an individual product into which a filler is filled. The branch connector includes a pair of split housings (16, 30) connected by connecting portions (46, 47) and fitted into each other and a filler (70) filled into the pair of split housings (16, 30). The surface shape of the filler (70) is formed into the pair of split housings (16, 30) such that it corresponds to an inner surface shape of the pair of split housings (16, 30).