The drill is rotatable about a central axis. The drill includes a central axis, a front end and a rear end opposite to each other in a direction along the central axis, an outer peripheral surface, a cutting edge formed at the front end and extending from the outer peripheral surface toward the central axis, a flank face contiguous with the cutting edge, a flute formed on the outer peripheral surface and extending spirally around the central axis from the front end toward the rear end, and a thinning rake face contiguous with the flute. The cutting edge has a main cutting edge extending from the outer peripheral surface and a thinning cutting edge contiguous with an end of the main cutting edge away from the outer peripheral surface. The flute includes a main rake face contiguous with the main cutting edge from the opposite side of the flank face. The thinning rake face is contiguous with the thinning cutting edge from the opposite side of the flank face. The thinning rake face is flush with the main rake face. The angle formed by the main rake face and the central axis is not less than -18° and not more than 7°. The width of the main rake face is not less than 0.07 mm and not more than 1.5 mm.