This invention provides a safe and highly stable peritoneal dialysate, which causes neither peritoneal membrane disorders nor peritoneal sclerosis associated with frequently repeated peritoneal dialysis treatment, which can protect residual renal functions in chronic renal failure, which inhabits the progress of renal damage over a long period of time, and which enables peritoneal dialysis treatment of diabetic patients. This peritoneal dialysate contains 0.05 to 3.5 w/v% of taurine and 0.1 to 6.5 w/v% of trehalose as osmotic agents and has a pH value adjusted between 6.5-7.5.
