Immunochromatographic test piece for extracting and measuring sugar chain antigen, which is capable of controlling development of specimen

An immunochromatographic test piece for extracting and measuring a sugar chain antigen in a specimen,

• the immunochromatographic test piece comprising:
• a single specimen adding port in a sample pad to which a specimen mixed with nitrite or an acid solution is added, wherein the sample pad is a site located most upstream of the immunochromatographic test piece;
• a label region comprising a labeled antibody obtained by labeling an antibody against the sugar chain antigen;
• and
• a detection region on which the antibody against the sugar chain antigen is immobilized, wherein
• an antibody-sugar chain antigen-labeled antibody complex is formed in the detection region to measure the sugar chain antigen, and
• the immunochromatographic test piece having a neutralizing reagent region impregnated with a neutralizing reagent, and
• further having a solid acid reagent region impregnated with a solid acid reagent when the specimen mixed with the nitrite is used, or a nitrite region impregnated with nitrite when the specimen mixed with the acid solution is used,
• the neutralizing reagent region being present upstream of the label region, and the solid acid reagent region or nitrite region being present upstream of the neutralizing reagent region,
• wherein a single flow channel of a continuous lateral flow is formed, and
• wherein a resin-made sheet is sandwiched between the solid acid reagent region or the nitrite region and the neutralizing reagent region such that the solid acid reagent region or the nitrite region and the neutralizing reagent region come into partial contact with each other, and the resin-made sheet suppresses the movement of a reagent or the movement of a specimen solution between the regions.