Aim: This descriptive study was conducted to determine the levels of treatment compliance of those undergoing peritoneal dialysis. Material and Method: This study was conducted with 93 patients who agreed to participate in the study and began peritoneal dialysis (PD) at least six months prior to the study, among a total of 109 patients followed in the peritoneal dialysis unit of a city for one year. The data of the study were collected using a questionnaire and a check form containing information about peritoneal dialysis and disease management-related practices of those undergoing peritoneal dialysis. The study was conducted after obtaining the Institutional Permit, Ethics Committee Approval, and the written and oral consent of the participants. Results: The average age of the participants in the study was 53.75±13.96, 53.8% of them were male, 75.3% were married, and 43% were primary school graduates. Mean diagnosis time of the patients was 6.88±5.78 years and the mean time to start the peritoneal dialysis was 3.85±3.30 years. It was determined in the study that the treatment compliance levels of those undergoing peritoneal dialysis and their compliance with most of the application steps of peritoneal dialysis were high, but their compliance with some application steps (such as wearing a mask) and in weight/fluid follow-up were low. Discussion: As a result of the study, we recommend monitoring the compliance of those who are undergoing peritoneal dialysis regularly or intermittently, and planning interventions that increase their levels of compliance with treatment.