To provide a guide member for a wire harness which has a new structure enabling wire harnesses having a wider range of diameters to be stably fixed with a tape and facilitating fixing work of the wire harness.

A bottom plate part 12 which extends having a given rectangular cross sectional shape and may bend in an extension direction and multiple guide protrusions 14 which protrude from both side edge parts 20a, 20b on one surface 16 in the plate thickness direction of the bottom plate part 12, are provided. While a tape guide clearance 22, in which a tape 26 fixing a wire harness 24 may be inserted, is formed between each pair of adjacent guide protrusions 14, 14, a tap attachment part 18, which is flat over the entire bottom plate part 12, is provided on the other surface of the bottom plate part 12 in the plate thickness direction.