Abstract. It is a well-documented empirical fact that men and women perform differently in language tasks involving various semantic categories. The sex-by-category effect has been reported in several languages and through different tasks. The results of these studies agree that some semantic categories are preferentially male while others are preferentially female, but which categories are associated with one gender or the other varies across studies. In our study, we tested a group of undergraduate native Spanish speakers from Argentina on a written semantic fluency task. Participants were tested on ten semantic categories, five from the Living Things domain (LT) and five from the Non-Living Things domain (NLT). While women retrieved more items than men across categories, differential output was only significant in five categories: animals, vegetables (LT), furniture and utensils (NLT) for females and tools (NLT) for males.