To solve a problem wherein conventional ant-repelling composition exerts bad influences on the health of operators or inhabitants though it exhibits ant-repelling properties, as almost all of conventional ant-repelling compositions are a pharmaceutical such as an agrochemical or the like and termites have been terminated by evaporation of the pharmaceutical on one hand, while human health has been injured by the volatilized substance on the other hand.

A borate salt as the main component prevents vermin damage by termites or the like but does not injure the health of humans or house pets as it does not vaporize. Even when the borate salt is taken into the body of humans, dogs, cats or the like, it is discharged out of the body as they have a kidney. Therefore, the borate salt is safe to humans and house pets.