Summary — The main purpose of this article is to analyse the political party system in the constitutional experience of the Second Spanish Republic. In this sense, the author tries to deal with the more relevant questions of the republican party system, especially those questions that could be faced as a result of the established electoral regime. In fact, special attention is paid to all provisions of the electoral regime which, in establishing departmental circumscriptions and in adopting a corrected majority system, aimed at enforcing political parties as the only main actors to articulate the new democratic and constitutional State. In this context, political parties within the framework of the 1931 Spanish Constitution did not reach a constitutional status. However, electoral laws tended in large part to promote the creation of strong, solid and well structured political parties and, at the same time, parliamentarian norms also tended to recognize the most important role in the exercise of parliamentarian functions to political parties since these were considered as the main mechanism by means of which governmental direction could be exercised. Finally, by developing these questions the author is able to conclude that, even if electoral norms encouraged the creation of strong political parties, the attainment of this end did not, in practice, become a reality.