An object of the present invention is to provide a blood analysis method and a blood test kit, which are capable of performing measurement of a plurality of target components to be analyzed with high accuracies in a case where hemolysis occurs in a case of measuring an amount of target components to be analyzed in a small volume of a blood sample. According to the present invention, provided is a blood analysis method for measuring a concentration of a target component to be analyzed, the blood analysis method including: a step of diluting a collected blood sample with a diluent solution, a step of determining a dilution factor by using a normal value of a normal component which is homeostatically present in blood, a step of analyzing the concentration of the target component to be analyzed in the blood sample, measuring an amount of hemolysis in the blood sample, correcting the dilution factor according to the measured amount of hemolysis, and analyzing the concentration of the target component to be analyzed using the corrected dilution factor.