One object of the present invention is to provide a reciprocation pump which can prevent a liquid to be supplied to an objective apparatus and a waste liquid to be discharged from the objective apparatus from being leaked to the outside of the reciprocation pump as well as a dialysis apparatus equipped with the reciprocation pump. According to the present invention, there is provided a reciprocation pump characterized in that it comprises a supply liquid-side sub-pumping chamber arranged adjacent to the supply liquid-side pumping chamber at the external side thereof a waste liquid-side sub-pumping chamber arranged adjacent to the waste liquid-side pumping chamber at the external side thereof a rod extending through the supply liquid-side sub-pumping chamber, the supply liquid-side pumping chamber, the waste liquid-side pumping chamber and the waste liquid-side sub-pumping chamber and being connected to the reciprocation means and the driving source to transmit a driving force of the driving source to the reciprocation means and sealing means arranged respectively in walls through which the rod extends for partitioning the supply liquid-side pumping chamber and the supply liquid-side sub-pumping chamber as well as the waste liquid-side pumping chamber and the waste liquid-side sub-pumping chamber.
