To provide a blade attachment/detachment jig by which a cutting blade can be attached to or detached from a rotary shaft without an operator directly touching the cutting blade.SOLUTION: A blade attachment/detachment jig is used for attaching a cutting blade to/from a rotary shaft, the cutting blade comprising: an annular base having an insertion hole made through from a surface side to a rear side and through which the rotary shaft is inserted, and a to-be-held part surrounding the insertion hole and projecting on the surface side; and an annular blade projecting toward the radially outside of the base from the outer peripheral part of the base. The blade attachment/detachment jig comprises a plate-like holding member and has, on one-end side of the holding member, a U-shaped holding groove, the leading end part of which is open for holding the to-be-held part.SELECTED DRAWING: Figure 1
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