In this study, the effect of ejector geometry on performance of an ejector-absorption refrigeration system (EARS) operating with the aqua/ammonia was investigated. By using of the ejector, the obtained absorber pressure becomes higher than the evaporator pressure and thus the system works with triple-pressure-level. The ejector has four functions: it (i) aided pressure recovery from the evaporator, (ii) upgraded the mixing process and the pre-absorption by the weak solution of the ammonia coming from the evaporator, (iii) increased absorber temperature and (iv) pre-absorption in the ejector improves the efficiency of the EARS. Performance improvement by ejector geometry under maximum COP and ECOP conditions is around 2.3% for COP and 4.7% for ECOP. CFD analysis of the geometry of the ejector also functions defined in theory has been found to fulfill visually.