PROBLEM TO BE SOLVED: To provide a microneedle which enables smooth administration of the medicine.SOLUTION: A microneedle 10 includes a base part 11 having a support surface 11S and a protrusion part 12 protruding from the support surface 11S. The protrusion part 12 includes: one main flow channel 15m which extends from the base end to the tip of the protrusion part 12 in the protrusion part 12 and a plurality of sub flow channels 15s which extend from the main flow channel 15m toward the peripheral surface of the protrusion part 12 and open on the peripheral surface. The end on the base end side of the protrusion part 12 out of both ends in the direction of extension of the main flow channel 15m in the main flow channel 15m is the opening end penetrating the support surface 11S and the end on the tip side of the protrusion part 12 is closed.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】薬剤の円滑な投与を可能としたマイクロニードルを提供する。【解決手段】マイクロニードル10は、支持面11Sを有する基体部11と、支持面11Sから突き出た突起部12とを備える。突起部12は、突起部12の内部において突起部12の基端から先端に向けて延びる1つの主流路15mと、主流路15mから突起部12の周面に向けて延びて当該周面に開口する複数の副流路15sとを有し、主流路15mにおける当該主流路15mの延びる方向の両端部のうち、突起部12の基端側の端部は支持面11Sを貫通する開口端であり、突起部12の先端側の端部は閉塞されている。【選択図】図1
