Abstract. Electronic open access journals are adopted by many Brazilian institutions, with over 1600 journals developed with the Open Journal System (OJS) at various universities. In this scenario, the submission process of article's documents in this system becomes focal point for usability analysis, because it is the step that constitutes the initial stage of interaction of various users profiles. Thus, this study aims to measure the level of satisfaction of the authors who submit manuscripts to OJS, with the aim of contributing to studies of this system. Therefore, a survey is presented using the System Usability Scale questionnaire. Satisfaction criteria are evaluated with the submission process by authors of a university journal portal. Results show that OJS appears intuitive, however some difficulties can be identifying in the process, even if the overall evaluation of the system is good. The study contributes to the discussion on the usability of OJS, aimed at improving this system that is widely used in Brazil.