An evaluating method includes an evaluating step of evaluating a state of colorectal cancer for a subject to be evaluated using (i) a concentration value of at least one metabolite of bABA, N-Me-bABA, 1-Me-His, aABA, Aminoadipic acid, bAiBA, Cadaverine, Ethylglycine, GABA, Homoarginine, Hypotaurine, Kinurenine, N6-Acetyl-L-Lys, Putrescine, Serotonin, Spermidine, Spermine, ADMA, Homocitrulline, 3-Me-His, Hydroxyproline, Phosphoethanolamine, SDMA, Acylcarnitine (13:1), and EPA in blood of the subject or (ii) a value of a formula calculated using the concentration value of the metabolite and the formula including an explanatory variable to be substituted with the concentration value of the metabolite.