A ball end mill includes an end mill body; a chip discharge groove, a first gash, and a bottom cutting edge. A second gash is formed at an interval from the bottom cutting edge on at least a first wall surface of the first gash. A minimum curvature radius in a cross section perpendicular to an axis of the second gash is larger than a minimum curvature radius in a cross section perpendicular to an axis of a groove bottom portion of the first gash.