To simulatively implement a retreating movement of a bicycle in a state wherein a rider dismounts from the bicycle. A simulated bicycle includes a steering angle sensor for detecting a steering angle of a handlebar, a momentary type retreating switch provided at a rear lower portion of a saddle, and a monitor for displaying a scene based on a simulated traveling speed, the steering angle and a signal of the retreating switch. When the retreating switch is operated, an image of a bicycle and a person who operates the bicycle to retreat is displayed on the monitor. The retreating switch is operated through a level so that the rider having dismounted from the bicycle can readily manually operate the same.