To provide an ozone generator capable of reducing a risk of damage due to vibration.SOLUTION: An ozone generator including: an arc tube in which an emission gas is encapsulated； and an excimer lamp having a first electrode and a second electrode, in which the arc tube includes a cylindrical part having a first end part and a second end part, a first diameter reduction part that is continuously formed from the first end part and has a diameter that becomes gradually smaller as separated from the first end part, and a second diameter reduction part that is continuously formed from the second end part and has a diameter that becomes gradually smaller as separated from the second end part, the first electrode is provided on an outer periphery surface of the first end part, the second electrode is provided on an outer periphery surface of the second end part, the arc tube is fixed via a cylindrical part, the first electrode is not extended on the first diameter reduction part, and/or the second electrode is not extended on the second diameter reduction part.SELECTED DRAWING: Figure 2【課題】 振動等による破損のリスクを低減させることができるオゾン発生装置を提供すること。【解決手段】 発光ガスが封入された発光管と、第１電極と、第２電極とを有するエキシマランプを備え、発光管は、第１端部及び第２端部を有する円筒部と、第１端部から連続的に形成され、第１端部から遠ざかるにつれて径が小さくなる第１縮径部と、第２端部から連続的に形成され、第２端部から遠ざかるにつれて径が小さくなる第２縮径部とを有し、第１電極は、第１端部の外周面に設けられており、第２電極は、第２端部の外周面に設けられており、発光管は、円筒部を介して固定されており、第１縮径部上には第１電極が延設されていない、及び／又は、第２縮径部上には第２電極が延設されていないオゾン発生装置。【選択図】 図２
