Abstract: A spike exchanger to move a spike from one peritoneal dialysis bag to another. A pair of peritoneal dialysis bags are mounted to a base having clamps for releasably closing the tubular ports of each bag. A patient connectable tube with a spike shaped end is removably mounted to a bar slidably mounted on the base and guided by means of a slot and roller combination to the tubular port of either bag. Three embodiments of the slot roller mechanism guide the spike shaped end to the tubular ports.