en عمومى General پژوهشي Research Abstract: Introduction: Self-care is an important tool in controlling pain in patients with rheumatoid arthritis. The aim of this study was to investigate who to assess pain using Orem Self-Care Model in patients with rheumatoid arthritis. Methods: This was a descriptive aspect of a clinical trial performed on 60 patients with rheumatoid arthritis who referred to a private clinic in Karaj. Data collecting tools were a demographic questionnaire consisted of 19 questions and Numeric Pain Rating Scale. The data result was analyzed using SPSS version 19. Less than 0.05 was considered significance. Findings: The mean age was 44 years, 90% were married and 35% had diploma. ANOVS test with repeated measures showed a significant differences in three measures of pain in the intervention group, while in the control group, this difference was not significant (p=0.59). Conclusion: Conclusively, Orem self-care model is effective in reducing pain in patients with rheumatoid arthritis. Self-care, Arthritis, Rheumatoid, pain, Orem Self-Care Model 33 38 http://intjmi.com/browse.php?a_code=A-10-1-195&slc_lang=en&sid=1 Elahe Sadat Saeedifar 10031947532846003458 10031947532846003458 No M.Sc. in medical surgical Nursing, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran Robabe Memariyan 10031947532846003459 10031947532846003459 Yes Assistant Professor, Department of Nursing, , Faculty of Medical Sciences, Tarbiat Modares University, Jalal Ale Ahmad Highway, Nasr (Gisha) Bridge, Tehran, Iran. Mohsen Akhyani 10031947532846003460 10031947532846003460 No Internist, Rheumatologist, Alborz, Iran Samira Fatahi 10031947532846003461 10031947532846003461 No Department of Operating Room, Kermanshah University of Medical Sciences, Kermanshah, Iran. Fatemeh Ghelichkhani 10031947532846003462 10031947532846003462 No Department of Midwifery, Faculty of Nursing and Midwifery, Saveh University of Medical Sciences, Saveh,Iran