To provide a protector capable of discharging water into an outside and a wire harness including the protector [Means for solving problem] A drainage hole 46 is formed as a portion so as to discharge water collecting in an electrical wire receiving portion 45 into an outside. The drainage hole 46 is formed so as to penetrate through the electrical wire receiving portion 45 and toward the rear of a vehicle. Further, the drainage hole 46 is formed so as to gradually slope from the electrical wire receiving portion 45 toward the ground surface. The drainage hole 46 is a through hole which is formed at a position near an end portion of a protection member for the vehicle interior 27. The drainage hole 46 is formed and located in a portion of the wire harness which is the closest to the ground surface.