Abstract: A knife sharpener having a specially configured sharpening groove for sharpening knives or the like to a particularly narrow and sharp edge. The sharpener comprises a body member having a rectangular extension which has a recess for engaging the sharpening blades. The body member has grooves therein for engaging support members, one of which acts as a guard from the knife sharpening activity. A second embodiment includes the supports being angled so as to place the knife sharpener at an angle for easy access thereto. The blades are substantially triangular in shape wherein the corners of each blade are rounded, all having equivalently-sized radii. The blades are detachably attached to the body member within the recess so that the blades can be rotated or flipped for exposing additional and fresh sharpening edges.