A method for detecting a target nucleic acid, the method comprising: a hybridization step in which one or two or more partially double-stranded nucleic acids associated with one or two or more target nucleic acids are brought into contact with one or two or more probes that are on a solid phase body carrier and are associated with the one or two or more target nucleic acids, under conditions that allow hybridization, wherein the hybridization step is performed by nucleic acid chromatography; and a detection step in which the hybridization product produced in the hybridization step is detected, wherein each of the one or two or more partially double-stranded nucleic acids has a single-stranded tag part at only the 5' end of a first strand, which consists solely of natural nucleic acids and which is a tag sequence capable of hybridizing specifically with one of the probes and has a label or label binding substance at the 5' end of a second strand, before the hybridization step an amplification step in which the partially double-stranded nucleic acid is obtained as a product of an amplification reaction performed on a target nucleic acid using a first primer having the tag sequence and a first recognition sequence that recognizes a first base sequence in the target nucleic acid and having a linking site capable of inhibiting or arresting a DNA polymerase reaction disposed between the tag sequence and the first recognition sequence, and a second primer having a second recognition sequence that recognizes a second base sequence in the target nucleic acid and the label or label binding substance; wherein the linking site comprises an optionally substituted alkylene chain with an element number of 2 to 40, adjoining a nucleotide in the primer via a phosphate diester bond; and wherein the linking site is represented by the following formula: 5'-O-C m H 2m -O-3' Formula (where 5' represents the oxygen atom of a phosphate diester bond at the 5' end, 3' represents the phosphorus atom of a phosphate diester bond at the 3' end, and m is an integer from 3 to 12). a hybridization step in which one or two or more partially double-stranded nucleic acids associated with one or two or more target nucleic acids are brought into contact with one or two or more probes that are on a solid phase body carrier and are associated with the one or two or more target nucleic acids, under conditions that allow hybridization, wherein the hybridization step is performed by nucleic acid chromatography; and a detection step in which the hybridization product produced in the hybridization step is detected, wherein each of the one or two or more partially double-stranded nucleic acids has a single-stranded tag part at only the 5' end of a first strand, which consists solely of natural nucleic acids and which is a tag sequence capable of hybridizing specifically with one of the probes and has a label or label binding substance at the 5' end of a second strand, before the hybridization step an amplification step in which the partially double-stranded nucleic acid is obtained as a product of an amplification reaction performed on a target nucleic acid using a first primer having the tag sequence and a first recognition sequence that recognizes a first base sequence in the target nucleic acid and having a linking site capable of inhibiting or arresting a DNA polymerase reaction disposed between the tag sequence and the first recognition sequence, and a second primer having a second recognition sequence that recognizes a second base sequence in the target nucleic acid and the label or label binding substance; wherein the linking site comprises an optionally substituted alkylene chain with an element number of 2 to 40, adjoining a nucleotide in the primer via a phosphate diester bond; and wherein the linking site is represented by the following formula: 5'-O-C m H 2m -O-3' Formula (where 5' represents the oxygen atom of a phosphate diester bond at the 5' end, 3' represents the phosphorus atom of a phosphate diester bond at the 3' end, and m is an integer from 3 to 12).