Boring tool

摘要

In a drilling tool including: a shank 13 located at a tip side of a tool main body; and a bit 14 located at a tip side of the shank, the shank 13 and the bit 14 (connection body) are connected to each other via screws, and a guide part for center alignment for aligning the centers of the shank 13 and the bit 14 is formed in the vicinity of screw portions of the shank 13 and the bit 14.