Abstract: An ALS treatment method includes administering to an ALS patient an inhibitor for a target A or a promoter for a target B. The target A is one or more genes selected from the genes in Table 1-1 or a protein encoded by the gene, and the inhibitor for the target A is a substance that inhibits expression of the gene, or a substance that inhibits a function of the protein encoded by the gene. The target B is one or more genes selected from the genes in Table 1-2 or a protein encoded by the gene, and the promoter for the target B is a substance that promotes the expression of the gene, or a substance that promotes a function of the protein encoded by the gene.