Deep underground in Kolar Gold Fields, in southern India, an experiment to detect proton decay had been carried out since the end of 1980. Analysis of data yielded the following results; (l) the life time of proton is about 1 x 1031 years, (2) it decays into wide spectrum of decay modes, p -> e+ + pai0, p ->anti-nutrino + K+ and so on, and (3) the life time and the distribution of decay modes are close to the predictions of SU(5) SUSY GUT. Four events representing possibly neutron oscillation are also seen.
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