To provide a hole drilling tool capable of reducing thrust force acting at the time of hole drilling machining, facilitating molding of a tool main body and regrinding, and supplying cutting fluid to an inner peripheral side of the tool efficiently.

In a hole drilling tool in which a pair of chip discharge grooves 13, 13 extending in the direction of axial line O are symmetrically formed for the axial line O on outer periphery of a tip part of a tool main body 11 substantially like circular column rotated around the axial line 0 and cutting edges 15, 15 are formed in a crossing ridge line part of a wall face facing the direction of tool rotation T of these chip discharge grooves 13, 13 and tip relief faces 14, 14 for the tool main body 11, a supply hole 17 for cutting fluid is formed along the axial line O in the tool main body 11, and this supply hole 17 is opened on the axial line O on the tip relief faces 14, 14.