Abstract: A boring tool may include a shaft member and a first cutter, a third cutter, and a second cutter fixed to the shaft member. A distance between the first cutter and the third cutter may be greater than a distance between the second cutter and the third cutter. The second cutter may have a second front end surface, a second cutting edge located on an outer peripheral side, and a second pocket. The third cutter may have a third front end surface, a third cutting edge located on the outer peripheral side, and a third pocket. The second pocket may be connected to the second front end surface at a right angle, and the third pocket may be connected to the third front end surface at an obtuse angle.