A nucleic acid amplification method includes: adsorbing a nucleic acid to fine particles by mixing a chaotropic substance-containing adsorbent liquid and the fine particles with a nucleic acid-containing sample; washing the fine particles adsorbing the nucleic acid with a first washing liquid; eluting the nucleic acid adsorbed to the fine particles in an eluate; and performing a nucleic acid amplification reaction on the nucleic acid in the eluate, the adsorbent liquid contains an alcohol, and the first washing liquid is acidic. This method can be carried out by a nucleic acid extraction device, a nucleic acid amplification reaction cartridge, and a nucleic acid amplification reaction kit.
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