The aim of this study is examine the factors affecting student's satisfaction with university portal services in Addis Ababa University. This study answers for five questions on factors affecting student's satisfaction of university portal with survey data from a sample of 314 students from collage of business and economics in Addis Ababa University. Data were collected through personal-administered questionnaire adapted from the updated DeLone and McLean (2003) information system success model. Descriptive analysis results revealed that information quality, system quality, educational service availability, user ability and Technological / IT infrastructural issues were influence users satisfaction. Educational service availability and Technological / IT infrastructural issues were found as the dominating factor in this research.