PROBLEM TO BE SOLVED: To provide a microtube containing a living cell or a water-soluble chemical substance having activity inside the microtube.SOLUTION: A microtube contains a cell or a water-soluble chemical substance inside it and has, on its outermost layer, a semipermeable membrane comprising a hydrophobic polymer.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】生細胞又は活性を有する水溶性化学物質を内部に含むマイクロチューブの提供。【解決手段】本発明のマイクロチューブは、内部に細胞又は水溶性化学物質を含み、最外層に疎水性ポリマーを含む半透膜を備える。【選択図】なし