The effect of heat treatment on the taste of milk was investigated usi
ng a taste sensor. The transducer is composed of seven electrodes with
different kinds of lipid membranes. Sensory evaluations by humans wer
e made in terms of three taste characteristics of ''richness (koku),''
''cooked flavor'' and ''deliciousness'' together with a measurement o
f whey protein denaturation. This study provided a quantitative descri
ption of the taste change caused by heat treatment of milk, because th
e output showed high correlations with richness and the degree of prot
ein denaturation.