Micro-needle and micro-needle array and the micro-needle array device

摘要

PROBLEM TO BE SOLVED: To provide a microneedle that can be easily thrust into skin diagonally, can strike a balance between the relief of pain to a patient and the prevention of leakage of a chemical, and can be easily manufactured.SOLUTION: The microneedle includes: a needle body having a cuspate shape; a plane part disposed at an outer peripheral surface of the needle body; and a flow path prepared in an inside of the needle body, opened to the plane part, and opened to the rear end side, thereby the plane part comes in contact with a cutaneous inside when the microneedle is injected in the cutaneous part, and the chemical supplied to the flow path will be discharged into the plane part side, the injection of the chemical can be efficiently performed.