Abstract: A hole forming tool has a main body constructed of a cemented carbide comprising 10±2 wt % Co. 0.65±0.25 wt % Cr, WC for the balance, and inevitable impurities. The average particle diameter of WC is in the range of 0.1 to 1.0 &mgr;m, and a radial rake angle of cutting edges formed at the end of the hole forming tool is set to a negative value in the range of −5° to −10°. Chip discharging grooves of which the helix angle is in the range of 5° to 15° are formed in the exterior surface of the hole forming tool. A groove width ratio of land portions and the chip discharging grooves is in the range of 0.9 to 1.1. A point angle is in the range of 125° to 1.35°, and a core diameter is in the range of 0.38D to 0.42D, in which D is the outside diameter of the drill. The main body of the hole forming tool is coated with a TiAlN layer.