An object of the present invention is to provide a means for simply performing a gene analysis without performing complicated operations. The present invention provides a method for the detection of a nucleic acid, comprising the steps of: performing a PCR reaction or a reverse transcription reaction by adding a template nucleic acid to a solid support on which a nucleic acid is fixed; and hybridizing the nucleic acid fixed on said solid support with the nucleic acid synthesized by the PCR reaction or the reverse transcription reaction.