The present invention relates to an analyzing tool including: a plurality of electrodes 10, 11 and 12 formed in an annular shape with stacked on one another in an axial direction; and a specimen layer formed in an interior of at least one of the plurality of electrodes 10, 11 and 12. The analyzing tool according to the present invention may be configured to include: a first electrode formed in an annular shape; a second electrode formed in an annular shape and inserted through an interior of the first electrode with a space from an inner peripheral surface of the first electrode; and a specimen layer formed between the inner peripheral surface of the first electrode and an outer peripheral surface of the second electrode.