[Problem] To provide an automated peritoneal dialysis machine with which the cumulative fill volume of peritoneal dialysis fluid can be calibrated with good precision to a predetermined setting value when a peritoneal dialysis fluid is filled into the peritoneal cavity of a low-fill-volume subject patient such as a child having a smaller peritoneal cavity dwell volume than an adult. [Solution] The present invention comprises the following: a storage unit (500) which has a normal-fill subject patient table (500T) with which the fill volume of the peritoneal dialysis fluid is calibrated to a target setting value when the filling of peritoneal fluid at a constant volume is carried out multiple times for a normal-fill subject patient (MM-A) and a low-fill-volume subject patient table 500R with which the fill volume of peritoneal dialysis fluid is calibrated to a target setting value when the filling of peritoneal fluid at a constant volume is carried out multiple times for a low-fill volume subject patient (MM-B), and when the fill volume approaches the target setting value, the machine is switched to micro-filling at a volume lower than that of constant-volume filling and a control unit (200) for either conducting a normal-fill subject patient mode on the basis of the normal-fill subject patient table (500T) or a low-fill-volume subject patient mode on the basis of the low-fill-volume subject patient table.
