The utility model relates to a photocatalyst bactericidal lamp structure, which comprises a pivot seat, a lamp tube seat, which is pivoted on the pivot seat and has a conductive seat part, a lamp tube, which has a conductive tube part which can be detachable and electrically connected to the conductive seat part, a light-emitting tube part which can be detachable and electrically connected to the conductive tube part and can generate a reaction light, and a reaction unit, which has a detachable and ground jacketed part The cover body of the light-emitting tube part and a plurality of reaction materials arranged in the cover body, each of which can produce photocatalyst effect after being irradiated by the reaction light.When the bactericidal effect of the photocatalyst bactericidal lamp is insufficient, the user can pivot the lamp holder at a replaceable angle to replace the cover body, which can indeed increase the convenience of replacement and avoid the waste of materials.本新型是一種光觸媒殺菌燈結構，包含：一樞座；一燈管座，樞設在該樞座，並具有一導電座部；一燈管，具有一能夠拆離地電性連接在該導電座部的導電管部、及一電性連接該導電管部且能夠產生一反應光線的發光管部；以及一反應單元，具有一能夠拆離地套置在該發光管部的罩體、及複數設在該罩體的反應材料，各該反應材料受該反應光線照射後能夠產生光觸媒作用。當該光觸媒殺菌燈的殺菌效果不足時，使用者能夠樞擺該燈管座一可進行更換的角度，即可進行更換該罩體，確實能夠增加更換的便利性與避免材料的浪費。
