With the recent introduction of visual-driving-support systems (i.e., camera monitoring systems), the driver-viewpoint degrees of freedom are increasing and are expected to increase further in the future. However, it remains unclear how drivers’ spatial cognition increases when a different viewpoint is added to the driver’s usual subjective viewpoint. Thus, we examined the influence on spatial cognition through experiments. As a result, the features of each viewpoint were found, and it was suggested that in the case when the proper use situation was clear, the spatial cognition was enhanced, but the case of uncertainty does not necessarily enhance unconditionally.