An object of the present invention is to provide a microneedle in which a drug hardly leaks. A microneedle includes a base portion having a support surface and a protrusion protruding from the support surface. The protrusion has a base end inside the protrusion. A main flow path 15m extending from the main flow path to the tip, and a sub flow path 15s extending from the main flow path 15m toward the peripheral surface of the projection 12 and opening to the peripheral surface. The flow path opening 20 has a shape in which the width at the base end side is smaller than the width at the tip end side of the projection 12, and of the two ends of the main flow path 15 m in the extending direction of the main flow path 15 m, The proximal end is an open end penetrating the support surface 11S, and the distal end of the projection 12 is not open at the distal end of the projection 12. [Selection diagram] Fig. 1【課題】薬剤が液漏れしにくい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、突起部１２は、突起部１２の内部において突起部１２の基端から尖端に向けて延びる主流路１５ｍと、主流路１５ｍから突起部１２の周面に向けて延びて周面に開口する副流路１５ｓとを有し、副流路１５ｓの開口部である副流路開口部２０が、突起部１２の尖端側の幅より基端側の幅の方が小さい形状であり、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の先端側の端部は突起部１２の先端に開口していない。【選択図】図１
