To provide an end mill capable of performing finish machining to a thin member such as an impeller at high speed.

The end mill includes a plurality of cutting blades each including an outer peripheral blade 4, a corner R blade 5 connected to the outer peripheral blade 4, and a bottom blade 6 connected to the corner R blade 5. The outer peripheral blade 4 formed on an outer peripheral surface of the end mill is formed to incline downward toward the tip side of the end mill with respect to a tool axis O, The inclination angle α at which the outer peripheral blade inclines downward is 5-10°. A rake face of each cutting blade includes a rake face 6a of the bottom blade 6, a rake face 5a of the corner R blade 5 connected to the rake face 6a of the bottom blade 6, and a rake face 4a of the outer peripheral blade 4 connected to the rake face 5a of the corner R blade 5, and the volume V of a chip pocket per blade is set in a range of 80 to 120 mm³.