A vehicle height adjustment device comprising: a spring comprising one end supported on a side of a body of a vehicle and comprising another end supported on a side of a wheel of the vehicle; an adjustor comprising an accommodation chamber that accommodates a fluid and configured to adjust a length of the spring in accordance with an amount of the fluid in the accommodation chamber; a storage chamber storing the fluid; a guide passage configured to guide the fluid from the accommodation chamber to the storage chamber; characterized in that vehicle height adjustment device further comprises: an actuator comprising an operation rod protruding from a case; a push rod configured to move when pressed by the operation rod of the actuator; a valve body configured to close the guide passage when seated on a seat and configured to open the guide passage when pressed and detached from the seat by the push rod, which has been pressed and moved by the operation rod; a press member comprising: a contact portion in contact with the valve body; and a rod-shaped shaft on a side of the contact portion which is opposite to the valve body side, the press member being configured to press and seat the valve body on the seat; an accommodation member accommodating the valve body and the contact portion of the press member and comprising an opening on a side of the shaft of the press member; and a support member disposed in the opening of the accommodation member and configured to support the shaft of the press member movably, the support member comprising a bearing hole communicating with the accommodation chamber. a spring comprising one end supported on a side of a body of a vehicle and comprising another end supported on a side of a wheel of the vehicle; an adjustor comprising an accommodation chamber that accommodates a fluid and configured to adjust a length of the spring in accordance with an amount of the fluid in the accommodation chamber; a storage chamber storing the fluid; a guide passage configured to guide the fluid from the accommodation chamber to the storage chamber; characterized in that vehicle height adjustment device further comprises: an actuator comprising an operation rod protruding from a case; a push rod configured to move when pressed by the operation rod of the actuator; a valve body configured to close the guide passage when seated on a seat and configured to open the guide passage when pressed and detached from the seat by the push rod, which has been pressed and moved by the operation rod; a press member comprising: a contact portion in contact with the valve body; and a rod-shaped shaft on a side of the contact portion which is opposite to the valve body side, the press member being configured to press and seat the valve body on the seat; an accommodation member accommodating the valve body and the contact portion of the press member and comprising an opening on a side of the shaft of the press member; and a support member disposed in the opening of the accommodation member and configured to support the shaft of the press member movably, the support member comprising a bearing hole communicating with the accommodation chamber. an actuator comprising an operation rod protruding from a case; a push rod configured to move when pressed by the operation rod of the actuator; a valve body configured to close the guide passage when seated on a seat and configured to open the guide passage when pressed and detached from the seat by the push rod, which has been pressed and moved by the operation rod; a press member comprising: a contact portion in contact with the valve body; and a rod-shaped shaft on a side of the contact portion which is opposite to the valve body side, the press member being configured to press and seat the valve body on the seat; an accommodation member accommodating the valve body and the contact portion of the press member and comprising an opening on a side of the shaft of the press member; and a support member disposed in the opening of the accommodation member and configured to support the shaft of the press member movably, the support member comprising a bearing hole communicating with the accommodation chamber.