The quality of services delivered to type 2 diabetic patients in primary health care has an important impact on long-term outcomes. The aim of this study is to explore diabetic patients' views of factors affecting quality of diabetic services delivered in primary care in Oman, a developing country with a high burden of diabetes. Methods: Semi-structured face to face interviews were conducted with 19 type 2 diabetic patients recruited from four selected primary healthcare centres (PHCs) in Muscat region, the capital city of Oman. A framework approach was used to analyse the qualitative data. Results: Participants identified several factors which could affect the quality of diabetic services provided in PHCs: delays in the follow-up process; lack of continuity of care; diabetes educational materials unavailable in waiting areas; shortage of Omani nurses able to speak the patients' language; inadequate explanations from the attending primary care physician (PCP); under involvement of dieticians in patient management; delays in provision of laboratory results; inadequate supplies of diabetic medication between appointments, and long waits to see ophthalmologists. Conclusion: Several factors were identified by diabetic patients that may influence the quality of diabetic services provided in the PHC setting in Oman. Health care professionals and decision makers in the Ministry of Health (MOH) and other health care sectors in Oman should consider patients' views and concerns in order to improve the quality of diabetic care services in primary health care.