PROBLEM TO BE SOLVED: To provide an ultraviolet light emitting element that can suppress time-dependent decrease in emission intensity.SOLUTION: An ultraviolet light emitting element includes: a first substrate 10； a plurality of electrodes 20 that are located on a main surface of the first substrate 10； a dielectric layer 30 that is located on the main surface of the first substrate 10 and covers the plurality of electrodes 20； a light emitting layer 40 which is located on the dielectric layer 30 and emits ultraviolet light and which is thicker in a first region 92 than in a second region 93, the first region being on the dielectric layer 30 and different from the second region 93, and the second region including at least a part of a region directly above the plurality of electrodes 20； and a second substrate 11 that is located to face the light emitting layer 40. Predetermined gas is filled in a discharge space 12 between the first substrate 10 and the second substrate 11. The light emitting layer 40 emits the ultraviolet light due to electrical discharge between the plurality of electrodes 20 in the gas.SELECTED DRAWING: Figure 1【課題】発光強度の経時的な低下を抑制することができる紫外光発光素子を提供する。【解決手段】第１の基体１０と、第１の基体１０の主面上に位置する複数の電極２０と、第１の基体１０の主面上に位置し、複数の電極２０を覆う誘電体層３０と、誘電体層３０上に位置し、紫外光を発する発光層であって、複数の電極２０の直上の領域の少なくとも一部を含む第２の領域９３より、第２の領域９３とは異なる誘電体層３０上の第１の領域９２において厚い発光層４０と、発光層４０に対向して位置する第２の基体１１とを備え、第１の基体１０と第２の基体１１との間の放電空間１２には、所定のガスが充填され、発光層４０は、ガス中における複数の電極２０間の放電によって紫外光を発する。【選択図】図１
