A vehicle height adjustment apparatus comprising: a plurality of vehicle height adjustment units that are respectively provided to correspond to wheels of a vehicle body, and adjust a vehicle height in response to the supply and discharge of a working fluid; a pressure tank that stores the working fluid; a compressor that pressure-feeds the working fluid; a plurality of opening and closing valves (24a, 24b, 24c, 24d) that are interposed between the vehicle height adjustment units and the pressure tank; a vehicle height acquisition unit that acquires a vehicle height value of each of the wheels; and a control unit that controls each of the vehicle height adjustment units to adjust a vehicle height, and controls the compressor, wherein when a vehicle height adjustment speed, which is calculated from the vehicle height value acquired by each of the vehicle height acquisition units during a vehicle height increasing process, is less than or equal to a predetermined threshold value, the control unit drives the compressor to pressure-feed the working fluid to the vehicle height adjustment units, characterized in that, the plurality of opening and closing valves include first and second opening and closing valves (24a, 24b), a first end of each of which is connected to the pressure tank via a tank connection main flow passage; a third opening and closing valve, a first end of which is connected to an outlet of the compressor via a compressor outlet flow passage and a second end of the second opening and closing valve, and a second end of which is connected to the vehicle height adjustment unit; and a fourth opening and closing valve, a first end of which is connected to an inlet of the compressor via a compressor inlet flow passage and a second end of the first opening and closing valve, and a second end of which is connected to the vehicle height adjustment unit, and when the working fluid flows from the pressure tank to the vehicle height adjustment unit due to a pressure difference there between, the control unit selects at least one of a first flow passage system that is formed when the first and fourth opening and closing valves (24a, 24d) are opened, and a second flow passage system that is formed when the second and third opening and closing valves (24b, 24c) are opened. a plurality of vehicle height adjustment units that are respectively provided to correspond to wheels of a vehicle body, and adjust a vehicle height in response to the supply and discharge of a working fluid; a pressure tank that stores the working fluid; a compressor that pressure-feeds the working fluid; a plurality of opening and closing valves (24a, 24b, 24c, 24d) that are interposed between the vehicle height adjustment units and the pressure tank; a vehicle height acquisition unit that acquires a vehicle height value of each of the wheels; and a control unit that controls each of the vehicle height adjustment units to adjust a vehicle height, and controls the compressor, wherein when a vehicle height adjustment speed, which is calculated from the vehicle height value acquired by each of the vehicle height acquisition units during a vehicle height increasing process, is less than or equal to a predetermined threshold value, the control unit drives the compressor to pressure-feed the working fluid to the vehicle height adjustment units, characterized in that, the plurality of opening and closing valves include first and second opening and closing valves (24a, 24b), a first end of each of which is connected to the pressure tank via a tank connection main flow passage; a third opening and closing valve, a first end of which is connected to an outlet of the compressor via a compressor outlet flow passage and a second end of the second opening and closing valve, and a second end of which is connected to the vehicle height adjustment unit; and a fourth opening and closing valve, a first end of which is connected to an inlet of the compressor via a compressor inlet flow passage and a second end of the first opening and closing valve, and a second end of which is connected to the vehicle height adjustment unit, and when the working fluid flows from the pressure tank to the vehicle height adjustment unit due to a pressure difference there between, the control unit selects at least one of a first flow passage system that is formed when the first and fourth opening and closing valves (24a, 24d) are opened, and a second flow passage system that is formed when the second and third opening and closing valves (24b, 24c) are opened.