A gas measurement apparatus includes: a body unit including a delivery port in which a users breath is delivered, a gas sensor connected to the inside of the delivery port, and an absorbent housing unit that houses an absorbent a cover unit capable of being operated to be slid in a predetermined direction with respect to the body unit and thereby being set to one of an open state in which the delivery port and the absorbent housing unit are exposed and a closed state in which the delivery port and the absorbent housing unit are cut off from an outside air, wherein at least in the closed state, a space in which the gas sensor is provided and the inside of the absorbent housing unit are connected to each other.
