The aim of the paper is to analyze the impact of socio-economic and demographic variables on the demand for meat and fish for Tunisian consumers. This study is one of the first applications in Tunisia with respect to the demand for meat and fish that simultaneously covers two important aspects: the non-imposition of, a priori, a functional form and the use of cross-section data including demographic and socioeconomic variables. The main results show that meat and fish consumption patterns by age, level of income and level of education are relatively different as regards to the economic factors (food expenditure and price). The changes in demographic and economic characteristics are influencing the changes in meat and fish demand.