A dialysis fluid transfer device according to the present invention comprises: a flow control device capable of controlling the flow of dialysis fluid a supply pump for supplying dialysis fluid to a dialysis filter a recovery pump for discharging dialysis fluid that has passed through the dialysis filter a volume chamber capable of temporarily storing dialysis fluid and a pressure relief bypass conduit for ensuring that the pressure of dialysis fluid does not deviate from a permissible level. Also, a hemodialysis device according to the present invention may comprise: the dialysis fluid transfer device a blood tube through which blood flows and a one-way valve installed on the blood tube. The hemodialysis device according to the present invention uses the dialysis fluid transfer device having the flow control device, a cylinder, and a piston, so as to quickly change the pressure of dialysis fluid at the dialysis filter in order to improve material transfer and dialysis efficiency. In addition, by transferring blood without using a blood pump, a mobile hemodialysis device can be provided which can be made smaller and lighter overall.La présente invention concerne un dispositif de transfert de liquide de dialyse qui comprend : un dispositif de régulation découlement, capable de réguler lécoulement du liquide de dialyse une pompe dalimentation afin dapporter le liquide de dialyse à un filtre de dialyse une pompe de récupération afin dévacuer le liquide de dialyse qui est passé à travers le filtre de dialyse une chambre de volume, capable de stocker temporairement un liquide de dialyse et un conduit de dérivation pour la décharge de pression, afin de sassurer que la pression du liquide de dialyse ne sécarte pas dun niveau admissible. Linvention concerne également un dispositif dhémodialyse qui peut comprendre : le dispositif de transfert de liquide de dialyse un tube de sang à travers lequel le sang sécoule et un clapet de non-retour installé sur le tube de sang.