Vinegar was produced from mango pulp by the twin processes of fermentation and oxidation, using Saccharomyces cerevisiae and Acetobacter aceti. S. cerevisiae was recycled to improve fermentation rate, while A. aceti was immobilized on wood shavings for semi-continuous vinegar production. The anal vinegar produced had 5.3% acidity as acetic acid. A conversion efficiency of 60% was achieved.