Purpose: OSCE, a performance assessment method using simulator and multimedia standardized patients can evaluate the student s clinical skills more effectively. It, however, lacks specific assessment criteria and methods for each station which OSCE consists of. Thus, in this research, we propose a web-based PBL (Problem Based Learning) performance assessment model which consists of the assessment criteria (Rubric) and the process for each OSCE station. Methods: In our model, setting the assessment criteria (Rubric) makes the goal of problembased learning clearer and the assessment procedure more objective by giving the concrete assessment measure. We decompose the PBL-based OSCE into five procedures: problem understanding, hypothesis clarification, the clarification of interaction role, the decision of performance assessment types, performance assessment testing. Results: The web-based model was developed consisting of five corresponding areas: problem setting, assessment criteria (Rubric), community, performance assessment types (automatic production, template production), the performance assessment testing. Conclusions: A proposed web-based PBL model will provide the concrete guidelines for clinical skill and attitude learning by giving more objective and clarified assessment criteria and by increasing the quality of assesment through the continuous development of assessment criteria.