A mail survey was conducted to investigate factors affecting public transport users´ satisfaction with the service. The respondents were residents of a metropolitan area of Sweden. A model was proposed and estimated using the maximum-likelihood method available in LISREL VIII. In the model, overall cumulative satisfaction is positively related to attribute-specific cumulative satisfaction which in turn is negatively related to the remembered frequency of negative critical incidents. In addition, measurement models indicated that both attribute-specific satisfaction and the frequency of negative critical incidents are related to treatment by employee, reliability of service, simplicity of information, and design.