To provide an end mill superior in the sharpness, and capable of reducing breaking by clogging of chips by securing a sufficient chip pocket for discharging the chips by reducing cutting resistance.

This end mill has 2 to 10 sheets of outer peripheral twisted blades 1. An outer peripheral rake surface 2 viewed in a cross section perpendicular to the axis, is composed of two outer peripheral rake angles γf1 and γf2. The first outer peripheral rake angle γf1 is set to 0° to 25°. The second outer peripheral rake angle γf2 is set to 5° to 40°. The first rake angle γf1 is set smaller than the second rake angle γf2. The first outer peripheral rake surface length (t) is set to 0.5 to 3 % of an outer diameter D. The core thickness W is set to 40 % to 70 % of the outer diameter D.