Problem to be solved: to provide a method of manufacturing a fine hollow projection device capable of manufacturing a hollow fine hollow projection at a high accuracy.Solution: the method of manufacturing the fine hollow projection 1 of the present invention is that a convex portion 11 having a heating means is abutted against one side 2D side of a base sheet 2A containing a thermoplastic resin, while the contact portion TP is softened by heat, and the convex portion 11 is stuck to the base sheet 2A and impacted from the side surface 2U side This is provided with a projection forming step for forming the projection 3.After the cooling step, there is provided a release step for removing the convex portion 11 from the inside of the projection 3 to form the fine hollow projection 1.In the projection forming step, the projection 3 is formed by using a first deflection restraining means for suppressing the deflection of the base sheet 2A when the convex portion 11 is stuck to the base sheet 2A.In the release step, a fine hollow projection 1 is formed by using a second deflection restraining means for suppressing the deflection of the base sheet 2A when the convex portion 11 is removed from the inside of the projection part 3.Diagram【課題】内部が中空の微細中空突起具を精度良く製造することができる微細中空突起具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具１の製造方法は、熱可塑性樹脂を含む基材シート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、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。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具１を形成するリリース工程を備える。突起部形成工程では、凸型部１１を基材シート２Ａに刺してゆく際に基材シート２Ａの撓みを抑制する第１撓み抑制手段を用いて突起部３を形成する。リリース工程では、突起部３の内部から凸型部１１を抜く際に基材シート２Ａの撓みを抑制する第２撓み抑制手段を用いて微細中空突起具１を形成する。【選択図】図４
