Abstract: The present invention provides a blood analysis apparatus which needs no mixing of multiple solutions described above, and has no deterioration of an analysis apparatus by application of a dry chemistry reagent which is good for storage, and thereby makes minimization of apparatus accomplishable, by introducing very small amount (several ?L or less) of blood into a micro-channel which is manufactured on an insulator substrate such as a quartz plate or a polymer resin plate by the centrifugal force to conduct separation, weighing the plasma, introducing it into a flow channel of a dry chemistry reagent which has been weighed by the flow channel volume, introducing light which has the same wavelength of the color development generated by the reaction with the plasma, and measuring the attenuation degree, and a blood analysis method, which allows blood analysis of high accuracy, high reliability and cheap price.