Provided is a harness protector, wherein a wire harness can easily be formed into a planar shape (with an oblate cross section), and maintained in that state. The harness protector is provided with: a protector body further provided with a roughly tabular-shaped bottom-plate section onto which a wire harness is to be placed, and a holding plate section that is integrally formed on one side of the bottom-plate section in pivotable state, and crushes the wire harness into an oblate cross-section shape, along with the bottom-plate section; and tying bands that anchor the holding plate section onto the bottom-plate section, in a state of having the holding plate section crushing the wire harness into an oblate cross-section shape.