Web application development using an MVC-based Web application model improves efficiency and reusability when restructuring an existing Web application. However it is difficult to clarify the whole behavior of a Web application only with analysis of the server-side resources.We propose a method for eliciting an MVC-based Web application model clarifying the behavior of the application by using dynamic analysis focusing on the HTTP information exchanges. We experimented with eliciting models from actual Web applications. The results show that it is possible to elicit models that express the behavior of Web applications by using the proposed method.