The present invention relates to: a chromatographic strip comprising a plurality of test lines for a competitive assay; a diagnostic kit comprising the chromatographic strip; and a method for qualitatively or quantitatively analyzing a target material within a specimen by using the same. By using the chromatographic strip of the present invention, qualitative analysis and highly reliable quantitative analysis can be rapidly and conveniently carried out with the naked eyes or a sensor even for a target material, which has one ligand binding position or is small. Furthermore, the present invention has an effect of improving the concentration measurement range of an analyte by the mutual supplementation of test lines and control lines.
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