Peritonitis is one of the most common and serious complications in patients who has undergone continuous ambulatory peritoneal dialysis (CAPD). In this study, it wasaimed to present a case of peritonitis that developed owing to Streptococcus salivarius and is associated with CAPD, which induced a day after going into a thermal pool. We wish to emphasize again that patients with CAPD should not go into the pool due to the increased number of microorganisms in stagnant water.