Patent ID: 8716032

Claim:
An immunochromatography method comprising: in a state where a complex of a test substance and a labeling substance containing a metal coupled with a first binding substance for the test substance is formed, the complex is developed on an insoluble carrier in presence of a protease hydrolyzate of protein; wherein the test substance and the labeling substance are captured at a detection site of the insoluble carrier containing (a) a substance which has a binding property to the first binding substance for the test substance or (b) a second binding substance for the test substance; and detecting the test substance by amplifying the labeling substance captured, wherein: the protease hydrolyzate of protein is a hydrolyzate which does not precipitate insoluble components under acidic conditions, and the protease hydrolyzate of protein is a protein hydrolyzate obtained by adding an acid to the protease hydrolyzate of protein, adjusting the pH to 4 or less and removing the precipitates precipitated.