To provide a coated cemented carbide made coating drill conventionally having had a limit of about five times of re-polishing and re-coating but now capable of undergoing re-polishing and re-coating more times.

This coated cemented carbide drill 1 has one layer or more than one layers of titanium aluminum nitride system hard films in a range of 2 to 3 mm from a knife edge head end part and 0.5 to 5 μm coated treated and is constituted of a coating region 3 and a non-coated region 4. It can be the one on which one layer or more than one layers of carbide, nitride, oxide and boride of periodic table Nos 4a, 5a, 6a group transition metals and Nos 3b, 4b group elements and applied with 0.5 to 5 μm coating in a region of 2 to 5 mm from the knife edge head end part 2.