A splice housing projects from a bottom wall in a space on a side portion of a main pathway of a wire harness, the main pathway being bounded by the bottom wall and a circumferential wall of a main body of a protector. The splice housing includes dividing walls projecting at predetermined intervals and a sealing wall at one end of the dividing walls. A plurality of splice housing chambers are provided in alignment between the dividing walls. A side opposite the sealing wall of each of the splice housing chambers forms an opening for insertion. Each of the splice housing chambers has a height capable of accommodating splices on at least two vertical levels. Of the splices branching from the wire harness, splices having a splice sheet wrapped around an outer circumferential surface thereof and splices covered by an insulating resin cap are accommodated vertically adjacent.