Background: People with end-stage kidney disease can either pursue conservative (palliative) management or kidney replacement therapy. Although transplant is preferred, there is a limited number of organs available rendering the majority of patients treated with some form of dialysis. Hemodialysis and peritoneal dialysis are equivalent regarding clinical outcomes, but peritoneal dialysis is much less costly to provide. Peritoneal dialysis is most often done in the home by the patient or a support person and carries a self-care burden on patients and families. Social support is important for patients receiving peritoneal dialysis and in sustaining peritoneal dialysis therapy. Few studies have comprehensively explored social support in the context of peritoneal dialysis. Objective: To explore how patients, family members, and nurses view social support. Design: Qualitative, descriptive study. Setting: An outpatient peritoneal dialysis clinic in Western Canada. Participants: Patients, family members, and nurses. Methods: Patients (n = 15), family members (n = 6), and nurses (n = 11) were interviewed between January and May 2018. Content analysis was undertaken using 4 attributes of social support (ie, emotional support, instrumental support, informational support, and appraisal support) as an analytic framework. Results: Themes related to the 4 attributes of social support were identified: addressing emotional needs and managing emotion (emotional support); peritoneal dialysis tasks and life tasks (instrumental support); accessing information, receiving information, and learning (informational support); and affirmation/external reassurance and self-confidence (appraisal support). The social support needs of both patients and family members varied and were dependent on their existing support networks and individual perspectives of support. Limitations: It is possible that some of the study findings were gender-bound as well as context-specific. The study findings could be different if the patient and caregiver sample were more balanced based on sex. There are also unique attributes of each peritoneal dialysis program that may impact the transferability of these findings to other practice settings. Conclusion: Home-based peritoneal dialysis has potential benefit to patients and health care systems. However, receiving peritoneal dialysis requires support. If health care providers wish to promote this treatment, they must also understand how to best support patients and their family members. Trial Registration: Not applicable.