Providing analysis tool used in the bilirubin assay method and the bilirubin measurement method using a dry reagent capable accelerate the reaction of bilirubin oxidase.
In bilirubin measuring method, after the mixing of the biological sample and the bilirubin oxidase-containing dry reagent, characterized by mixing the mixture with a surfactant-containing dry reagent. Further, in the analysis equipment (1) used in bilirubin assay, the sample supply unit (11), said passage (12, 13, 14), to one of the detection unit (15), bilirubin oxidase and a surfactant, wherein wherein the bilirubin oxidase is positioned so as to be located closer to said sample supply unit from the surfactant (11).