Provided are: a puncture device which is compact and lightweight； and a method for manufacturing the puncture device. A puncture device (1) is a device for transferring an active ingredient into a human body through the skin. The puncture device (1) is provided with a cylindrical housing (H), a piston (P) which is disposed within the housing (H) in a slidable manner, and a conical spring (40) which is disposed within the housing (H) and which applies pressing force to the piston (P). The piston (P) has a piston body (20) and has a micro-needle member (30) which is engaged and integrated with the piston body (20). The micro-needle member (30) has a base plate (31) and has micro-needles which protrude from the surface of the base plate (31).本發明提供能謀求小型化及輕量化之穿刺裝置及其製造方法。穿刺裝置(1)係用以通過皮膚讓活性成分移轉到體內的裝置。穿刺裝置(1)具備筒狀之殼體(H)、配置成可在殼體(H)內滑動之活塞(P)、以及配置在殼體(H)內且用以對活塞(P)賦予彈壓力之圓錐線圈彈簧(40)。活塞(P)具有：活塞主體(20)、及被卡合於活塞主體(20)而與活塞主體(20)一體化之微針構件(30)。微針構件(30)具有：基板(31)、及突出設置在基板(31)表面之複數支微針。
