The present invention pertains to: a novel trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof； and a drug containing the compound as the active ingredient. Specifically, the trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof is represented by general formula (I) (in the formula, X indicates a substituent group such as 1-pyrrolidilyl, 3-thiazolidyl, or piperidino), and is highly useful as a drug such as a prevention or treatment agent for peripheral nerve disorders resulting from anti-cancer drug administration, a prevention or treatment agent for neurodegenerative disorders or psychiatric disorders including dementia, Alzheimer's disease, Parkinson's disease, diabetic neuropathy, depression, glaucoma, and autism spectrum disorders, a treatment or repair agent for spinal injuries, an analgesic for various pain disorders, and the like.
