In this study, it was aimed to compare the surface roughness of walnut ıIuglans regia L.) and mahogany (Klıaya sp.) species when the cutting with the circular saw at feed rate by either 5 mlmin. or 9 nı/min with the saw diameter of 250 mm which have 24 and 40 teeth. For this purpose, the experimental samples were prepared from walnut and mahogany species that are sawed at their radial direction. The surface roughness of sawed samples was measured in accordance with TS 930. According to the results, walnut wood has given the best result at surface roughness which has been sawed with 40 teeth saws and at 5 mlmin feed ra te.