PROBLEM TO BE SOLVED: To provide a method for extracting effective components contained in plant tissue in such a form as absorbable in the human body.SOLUTION: The method for extracting effective components in plant tissue includes a component extraction process. In the component extraction process, the pressure and temperature are retained inside a sealed space with a plant raw material as an object to be processed in the range of temperature from 125°C to 135°C and in the range of pressure from 2 to 3 atmospheric pressure, which are pressure and temperature necessary to hydrolyze the plant tissue, for a fixed period of time while controlling the steam pressure as a partial pressure inside the sealed space along a saturated steam pressure curve. After that, the temperature and pressure inside the sealed space are lowered while the pressure and temperature are controlled along the saturated steam pressure curve, and the steam generated inside the sealed space is infiltrated into the plant tissue to hydrolyze the plant tissue. At the same time, the steam pressure inside the sealed space is made to act on the surface of the object to be processed, and components in the plant tissue generated by the hydrolysis are extracted out of the object to be processed.COPYRIGHT: (C)2012,JPO&INPIT【課題】植物の組織中に含まれる有効成分を人体に吸収できる形で抽出する方法を提供する。【解決手段】成分抽出処理を有する植物組織有効成分抽出方法である。成分抽出処理は、植物原料を被処理物として密閉空間内で、密閉空間内の分圧として水蒸気圧を飽和水蒸気圧曲線に沿って制御しつつ植物組織の加水分解に必要な圧力と温度である温度125℃~135℃、圧力を2気圧~3気圧の範囲で一定時間その圧力、温度を保ち、その後、飽和水蒸気圧曲線に沿って圧力及び温度を制御しつつ密閉空間内の温度及び圧力を下降させ、密閉空間内に発生する水蒸気を植物組織内に浸透させて植物組織を加水分解するとともに、密閉空間内の水蒸気圧を被処理物の表面に作用させ、加水分解によって生成した植物組織内成分を被処理物の外部に搾り出す処理である。【選択図】図7