Background: Palliative care education and training remains inadequate for medical professionals especially in developing countries. We evaluated the impact of a one month palliative care clinical rotation on medical residents’ attitude, competency, and knowledge related to palliative care in a tertiary cancer center in Jordan. Methods: All transitional Internal Medicine residents rotated in a monthly palliative care rotation at King Hussein Cancer Center (KHCC), in Amman, Jordan, were requested to participate in this educational intervention study. A concise curriculum in palliative and end of life care, adapted from the Education for Physicians on End-Of-Life Care (EPEC) Curriculum and delivered by our faculty was piloted as a part of the clinical rotation. Residents spent one month in the inpatient palliative care unit, in addition to 10 hours of classroom interactive sessions. The curriculum comprised of five modules: 1- Principles of palliative care, 2- Pain management, 3- Management of distressing symptoms, 4- Communication skills, 5- End-of- life care. To assess our educational outcomes, we adapted a previously developed instruments by David Weisman and used by the National Residency Education in the United States. All Instruments were completed by each resident before and after the rotation, and included self-assessment of attitude, competency and a knowledge test comprising of 32-items of multiple choice questions. Results: Twenty of 27 (74%) residents who started the palliative care rotation completed the required education and had paired evaluations. There was improvement in all three instruments: 37% improvement in competence (p < 0.0001), 17% Improvement in knowledge (p = 0.015), and 5% improvement in attitude (p = 0.02). Conclusions: The one-month mandatory rotation improved knowledge, attitude and competence related to palliative care for medical residents.