Single cell protein production test by yeast strains using tubers from sweet potato and yam residues. This study describes the use of the residues of tubers of sweet potato and yam for the production of single cell proteins in Burkina Faso. Two strains of Saccharomyces cerevisiae and two of Candida utilis were used. These strains were selected from 25 strains isolated in the residues according to their specific rate of maximum growth. The optimum concentration in glucose was 22 mM, the optimum pH 5 and the maximum temperature 30 °C. A specific rate of maximum growth of 0.24·h-1 and one output maximum of conversion of substrate of 0.36 were observed respectively with the strains C. utilis NOY 14 and S. cerevisiae NOY 4. The considerable values of µmax and Yx/s were obtained with the low concentrations of glucose (22 mM). The protein content of the biomass was between 40.4% and 46.9%.