A radius end mill includes an end mill body, peripheral cutting edges, bottom cutting edges and corner cutting edges. Each of the corner cutting edge is formed so as to curve toward the terminal end of the end mill body after the corner cutting edge has reached the distal end of the end mill body. A rake surface of the corner cutting edge is formed so as to be flush with the rake surface of the bottom cutting edge. When an external diameter of the end mill body is D, a value of a radius of curvature R of the corner cutting edge is greater than or equal to 0.1×D and is less than or equal to 0.3×D.