The purpose of the present invention is to provide a micro-needle having a leading end that can reach the dermis with certainty by penetrating through the epidermis when piercing the skin and that can supply a drug or the like to the dermis or to a region deeper than the dermis. Accordingly, this micro-needle (10) has a base (1) and a plate-shaped blade (2). The plate-shaped blade (2) and the base (1) are formed in an integrated manner, and the plate-shaped blade (2) extends from an end (1A: step section) of the base (1). Alternatively, the present invention is characterized by having a base (111) and a conical leading end part (112) and a star-like polygonal cross-sectional shape part (114, 124) being formed in a region between the base (111) and the conical leading end part (112), and in that the base (111), the conical leading end part (112) and the star-like polygonal cross-sectional shape part (114, 124) are formed in an integrated manner.本發明之目的在提供一種穿刺皮膚時其前端能確實貫穿表皮到達真皮，且可將藥品供給到真皮或比真皮更深區域的微針。因此，本發明的微針(10)具有基座(1)及板狀刀片(2)，板狀刀片(2)和基座(1)係形成一體，板狀刀片(2)則從基座(1)的端部(1A：階段部)延伸。或者，具有基座(111)及圓錐形前端部分(112)，基座(111)和圓錐形前端部分(112)之間的區域形成有星形剖面多角形部分(114、124)，而基座(111)、圓錐形前端部分(112)及星形剖面多角形部分(114、124)係形成一體。
