Abstract: A router guide assembly adapted to be releasably or semipermanently attached to the work face of a router. The router guide assembly includes a circular base plate having a central aperture through which the cutting bit of the router extends. A pair of guide posts may be adjustably mounted to the base plate on each side of the cutting bit perpendicularly to the base plate and are laterally adjustable relative to the cutting bit. The guide posts may also be removed from the base plate so that the base plate can serve as the work face of the router.