Provided are a concentrate concentrating apparatus, a stock solution treating apparatus and a circulating type treating apparatus capable of preventing accumulation of cells and the like in a filtering member and continuously concentrating and concentrating raw water such as thoracic ascites and plasma. An apparatus for concentrating a stock solution such as breast ascites or plasma to form a concentrated solution, comprising: a filter unit 10 having a filtration member for filtering the stock solution a filtrate filtered, the filtrate is concentrated A concentrator 20 for forming a concentrate, and a stock solution supply unit for supplying the stock solution to the strainer 10, wherein the stock solution supply unit has a supply amount adjustment function for adjusting the amount of the stock solution to be supplied to the filter . It is possible to obtain a concentrate containing no cellular components and having a high concentration of active ingredient. By treating the stock solution at a flow rate at which accumulation of cells or the like on the filtering member is unlikely to occur, it is possible to improve the processing efficiency of stock solutions such as thoracic ascites and plasma.濾過部材に細胞等が堆積することを防ぐことができ、胸腹水や血漿などの原水を連続して濾過濃縮することができる原液濃縮装置、原液処理装置および循環型処理装置を提供する。 胸腹水や血漿などの原液を濃縮して濃縮液を形成する装置であって、原液を濾過する濾過部材を備えた濾過器10と、濾過された濾過液が供給され、濾過液を濃縮して濃縮液を形成する濃縮器20と、濾過器10に原液を供給する原液供給部と、を備えており、原液供給部が、前記濾過器に供給する前記原液の量を調整する供給量調整機能を有している。細胞成分を含まず有効成分濃度の高い濃縮液を得ることができる。濾過部材への細胞等の堆積が生じにくい流量で原液を処理すれば、胸腹水や血漿などの原液の処理効率を向上させることができる。
