A toner case includes a case main body, a feeding mechanism, a displacement member, and an elastic member. The case main body stores toner. A ventilation port is formed in the case main body. The feeding mechanism feeds the toner to outside the case main body. The displacement member includes a seal portion and is configured to be displaced between a closing position and an opening position. When the displacement member is at the closing position, the seal portion closes the ventilation port, and when the displacement member is at the opening position, the seal portion opens at least a part of the ventilation port. The elastic member holds the displacement member at the closing position by applying an elastic force to the displacement member.