The purpose of this paper was to determine the important role of Chief Executive Officer emotional intelligence to explain the interaction relationship between research and development investment and corporate social responsibility categories. This research relied on the completion of a questionnaire type inquiry structured around the table-based analysis. The questionnaire was sent out to a large sample of Tunisian firms’ Chief Executive Officer. The results of the 96 valid responses were entered for analysis by the partial least squares method. They show the significant effect of Chief Executive Officers’ emotional intelligence on the relation between corporate social responsibility categories (