To provide a tubular artificial organ having predetermined strength to hold a lumen without increasing a wall thickness of a tube wall, which is excellent in biocompatibility and growth properties.SOLUTION: A tubular artificial organ 1A includes a tubular tissue body 10 composed of fibrotic tissues, which is formed under an environment where a biological tissue material exists, and a tubular reinforcement body 20A composed of a biodegradable material, which is included in the tubular tissue body 10. The tubular tissue body 10 is formed into a tubular shape by implanting a mold in a living body, and the tubular reinforcement body 20A is included over the entire length. The tubular tissue body 10 is composed of a biodegradable material into a mesh shape.SELECTED DRAWING: Figure 1【課題】管壁の肉厚を厚くしなくても内腔を保持可能な所定の強度を有し、生体適合性や成長性に優れた管状人工臓器を提供する。【解決手段】管状人工臓器１Ａは、生体組織材料が存在する環境下で形成され、線維性組織で構成される管状組織体１０と、生分解性の材料で構成され管状組織体１０に内包される管状補強体２０Ａと、を備える。管状組織体１０は、生体内に鋳型を埋植することにより管状に形成され、管状補強体２０Ａが全長に亘って内包される。また、管状組織体１０は、生分解性の材料で網目状に構成される。【選択図】図１
