The present invention relates to a cutting tool for cutting or drilling a brittle work piece such as stone, bricks, concrete and asphalt, and a method for manufacturing thereof. The present invention provides a cutting tool including a shank rotatably connected to a driving device and segments welded at predetermined intervals on an outer periphery of the shank. Each of the segments has abrasives attached thereto by brazing and the each segment is welded after the abrasives are brazed thereto. Also, a method for manufacturing thereof is provided. The present invention ensures improvement in cutting capacity and useful life of the cutting tool.