PROBLEM TO BE SOLVED: To provide a processor of a stem board of garlic excellent in work efficiency; and to provide a drill bit and a spring.SOLUTION: A processor 10 of a stem board of garlic G includes a holding part 50 for holding the garlic G, a drill bit 30 advanceable toward the stem board of the garlic G held by the holding part 50, and a spring 40 advancing together with the drill bit 30, and pressing the garlic G by a tip upon advancing, in which a pitch of the spring 40 is unequal in length.SELECTED DRAWING: Figure 1