For ozone generator

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To prevent the decrease of ozone concentration in the case that high purity oxygen without adding nitrogen is used as the raw material gas in a discharge type ozonizer. In an ozonizer in which a dielectric 10 is arranged contacting at least one of electrodes 30 to form a discharge gap 20 for the generation of ozone between a pair of electrodes 30, 30, a transition metal bronze containing alkaline metals, alkaline earth metals, or rare earth metals at position A of the transition metal oxide having a crystal structure in which an atom does not exist at position A of the perovskite structure is made to exist on the above-described surface of the dielectric 10.