A kind of biochemical reaction detector structure, including a pedestal, a cover plate, plural electrode and an at least reagent. Pedestal includes a platform, a reagent trough and an insertion end, and reagent trough is arranged at what platform, and the other end of insertion end opposed platforms is arranged. Cover plate is equipped with an at least inlet hole and covers on what platform, and inlet hole relative reagent slot is arranged. Each electrode includes a conversion zone of position what reagent trough and the plural contact-segment for exposing insertion end surfaces. An at least reagent attaches on each conversion zone of what. Reagent trough thereby is flowed into using specimen gravity itself, flows through path length to shorten a specimen, and improve the correctness of detection data.一種生化反應檢測器結構,包括一基座、一蓋片、複數電極及至少一試劑。基座包含一平台、一試劑槽及一插入端,試劑槽設置於平台處,插入端相對平台的另一端設置。蓋片設有至少一滴入孔並覆蓋於平台上,且滴入孔相對試劑槽設置。各電極包含位於試劑槽的一反應段及暴露出插入端表面的複數接觸段。該至少一試劑貼附於各反應段上。藉此利用檢體本身重力流入試劑槽,以縮短檢體流經路徑長度,並提高檢測數據的正確性。