PROBLEM TO BE SOLVED: To automatically and continuously perform a plurality of steps of dialysis treatment even by using a lamination-type dialyzer and the like, on the basis of a reverse filtration-type hemodialyzer.SOLUTION: A hemodialyzer 1 includes a solution sending line 50 that has one end connected to a dialysate solution introduction line 41 and that has the other end connected to an artery side blood circuit 20, and a flow rate throttle means 51 that is provided on a dialysate solution flow direction downstream side with respect to a part connected to the solution sending line 50 in the dialysate solution introduction line 41 and that throttles back a flow rate of the dialysate solution introduction line 41.COPYRIGHT: (C)2015,JPO&INPIT【課題】逆濾過方式の血液透析装置をベースとし、積層型ダイアライザー等を使用しても透析治療の複数の工程を自動的に連続して行うことができるようにする。【解決手段】血液透析装置1は、一端が透析液導入ライン41に接続され、他端が動脈側血液回路20に接続された送液ライン50と、透析液導入ライン41において送液ライン50が接続された部分よりも透析液流れ方向下流側に設けられ、透析液導入ライン41の透析液の流量を絞る流量絞り手段51とを備えている。【選択図】図3