In this Paper, the ozonizer is fabricated by piling plate-type electrodes up to minimize and reduce install space. Hereby ozone generation characteristics of piled plate-type ozonizer were investigated. Inverse-polarity voltage was generated by H.V neon transformer. And 2 H.V neon transformers were used to supply high voltage each 9 electrodes of plate-type ozonizer. According to the experiments, ozone concentration, generation and yield were proportionally increased tilth increasing the number of electrode. And the maximum increase effects of 246%, 245%, and 33% were obtained when the number of electrode were increased from 3 up to 9.