Nephrology professionals have selected continuous ambulatory peritoneal dialysis (CAPD) as the best initial therapy for patients who have chronic renal failure. Among complications, peritonitis continues to be one of the most important complications of CAPD. The typical spectrum of organisms causing peritonitis include Gram-positives (67%), Gram-negative rods (28%), fungi (2.5%), and anaerobics (2.5 %). Among Gram-negative bacterial species, Escherichia coli, Acinetobacter species, and Enterobacter are the most seen pathogens. In this report, we present a case of CAPD peritonitis due to Morganella morganii. To our knowledge, this presentation is the second report of CAPD peritonitis due to M. morganii.