PROBLEM TO BE SOLVED: To provide a pressurization device equipped with a constitution capable of preventing a material to be treated in a pressure container from being flowed through the pressure container by a liquid flow, and from being sucked into the exhaust port when the interior of the pressure container is filled with a liquid pressure medium.SOLUTION: The topmost part of at least one of both axial ends of a horizontally-disposed pressure container 1 is provided with an exhaust port 15a, and a position lower than the exhaust port 15a on both ends of the horizontally-disposed pressure container 1 is provided with a liquid supply port 14a. Because a liquid pressure medium is supplied from the liquid supply port 14a into the pressure container 1 by a plumbing unit 3 (pressure medium supplier), the interior of the pressure container 1 is filled with the pressure medium while air is being exhausted from the exhaust port 15a.SELECTED DRAWING: Figure 3【課題】圧力容器の内部を液体の圧力媒体で満たす際に、圧力容器内の被処理物が液流により圧力容器内で流れて排気口に吸い込まれることを防止することができる構成を備えた等方圧加圧装置を提供すること。【解決手段】横置き配置された圧力容器１の軸方向両端側のうちの少なくとも一方の最上部に排気口１５ａが設けられており、横置き配置された圧力容器１の軸方向端側の、排気口１５ａよりも低い位置に給液口１４ａが設けられている。給排水ユニット３（圧媒供給装置）により給液口１４ａから圧力容器１の中へ液体の圧力媒体が供給されることで、排気口１５ａから空気が排出されつつ圧力容器１の中が前記圧力媒体で満たされる。【選択図】図３
