Provided are a novel ²-glucuronidase inhibitor including a compound selected from a macrocyclic ketone, a ketone, a macrocyclic lactone, a macrocyclic oxalactone, an ester, an aldehyde, an alcohol, and a terpene of specific kinds, and an environmental hygiene product and a sanitary product each containing the ²-glucuronidase inhibitor. Also provided are a composition for suppressing the generation of urine odor and a method of suppressing the generation of urine odor each using a ²-glucuronidase inhibitor.
