Chain saw guide plate

In a chain saw having a chassis, a guide plate having means about its peripheral edge for guiding a saw chain disposed for running movement over the peripheral edge, and a freely rotating guide roller mounted at the forward tip of said guide plate, the improvement wherein said guide roller is journalled in a support separate from said guide plate, said support being detachably secured to the forward tip of said plate and being provided with a chain guard extending forwardly therefrom to overlie the nose of said saw chain, and an elongated saw chain cover pivotally mounted at one end on said roller support and extending rearwardly over the top run of said saw chain, said cover being liftable in response to the cutting of a workpiece larger than the transverse dimension of said guide plate.