To search the evidence predicted by the fracto‐fusion model, we tried to observe the charged particles and micro‐discharges accompanying the electrolysis of D2O. To detect the micro‐discharges, a current pick‐up was set at the anode input, and the high‐frequency component in the anode current was monitored. A detector for charged particles was attached close to a thin palladium‐foil cathode. The counting rate of the pulse‐like responses induced on the anode current was found to be a few counts per hour at the beginning of electrolysis, and then decreased slowly. The counting rate indicated a correlation with the temperature of the electrolyte, but no obvious correlation with charged particle emission was observed.