PROBLEM TO BE SOLVED: To provide a manufacturing method of a fine hollow protruding object capable of holding down costs, and efficiently and continuously manufacturing a fine hollow protruding object.SOLUTION: A manufacturing method of a fine hollow protruding object 1 includes a protruding part formation process for allowing a projected part 11 including heating means to abut from a side of one face 2D of a base sheet 2A formed by containing a thermoplastic resin, and for forming a protruding part 3 projecting from a side of another face 2U of the base sheet 2A by allowing the projected part 11 to pierce into the base sheet 2A while a contact portion TP in the base sheet 2A is softened by heat. The manufacturing method also includes a cooling process for cooling the protruding part 3 while the projected part 11 is allowed to pierce into the protruded part 3. The manufacturing method includes a release process for extracting the projected part 11 from the inside of the protruding part 3 after the cooling process so as to form the fine hollow protruded object 1.SELECTED DRAWING: Figure 4【課題】コストアップを抑え、効率的に連続して微細中空突起物を製造することができる微細中空突起物の製造方法を提供すること。【解決手段】本発明の微細中空突起物１の製造方法は、熱可塑性樹脂を含んで形成された基材シート２Ａの一面２Ｄ側から、加熱手段を備える凸型部１１を当接させて、基材シート２Ａにおける当接部分ＴＰを熱により軟化させながら、凸型部１１を基材シート２Ａに刺してゆき基材シート２Ａの他面２Ｕ側から突出する突起部３を形成する突起部形成工程を備える。また突起部３の内部に凸型部１１を刺した状態で該突起部３を冷却する冷却工程を備える。そして冷却工程の後に、突起部３の内部から凸型部１１を抜いて微細中空突起物１を形成するリリース工程を備える。【選択図】図４
