ABSTRACT The Western Ontario Rotator Cuff Index (WORC) is a Questionnaire designed to assess the impact of rotator cuff (RC) disorders on the general quality of life of patients. The purpose of this study was to test the reliability of the Arabic version of the WORC Index in Egyptian patients with rotator cuff disorders.Overall, 210 patients with RC disorders were involved in this study. The recruiting patients finished all two rounds of the Arabic WORC within one week.  Cronbach's alpha (α) and intra class correlation coefficients (ICC) were used to assess internal consistency and test-retest reliability respectively. The Arabic version of the WORC demonstrated excellent internal consistency, with a Cronbach's alpha (α) coefficient of 0.971 for the overall scale. The total scores of the WORC exhibited high test-retest reliability, with an intra class correlation coefficient (ICC) value of 0.893. The Arabic version of the Western Ontario Rotator Cuff (WORC) Index is a reliable measurement tool for assessing health-related quality of life in Arabic-speaking patients with rotator cuff disorders.