An object of the present invention is to provide a vehicle height adjusting device for a motorcycle, which enables a vehicle height to be retained at any intermediate position and which implements instantaneously switchover of the vehicle height. The vehicle height adjusting device for the motorcycle has a vehicle height detection means (80) for detecting the vehicle height, a selector valve (60) that connects, by switching, a jack chamber in a hydraulic jack to an oil reservoir chamber that communicates with oil chambers in a damper tube, and a control means (70) for controlling the switching of the selector valve (60) based on a detection result from the vehicle height detection means (80) in order to retain the vehicle height at any position.