To provide a ball end mill reducing loss in the tip part, having superior abrasion resistance, miniaturizing the diameter, and advantageous in the production cost, in the ball end mill used for cutting work such as metal mold machining.

This ball end mill 1 is formed by providing a plurality of strips of bottom blades with a semispherical rotation locus around the axis. The tip bottom blade part provided with the bottom blade 3 comprises a tip 5 for cutting the vicinity of the axis and a base part 6 brazing the tip. The tip comprises cemented carbide or high speed tool steel, the base comprises cermet or ceramic, the vicinity of the axis apt to be lost comprises cemented carbide or high speed tool steel with high toughness, and the outer circumferential part apt to be abraded comprises the cermet or ceramic.