The vehicle obstacle detecting device improves safety of the vehicle by utilizing information detected by a plurality of sensors to appropriately handle situations in which an obstacle exists in a blind spot of the sensors. The vehicle obstacle detecting device includes at least first and second sensors arranged such that sensing scopes of the first and second sensors do not substantially overlap. The vehicle obstacle detecting device is configured to observe the behavior of an obstacle existing within the sensing scope of one of the first and second sensors and predict the blind spot behavior of the obstacle in a blind spot between the sensing scopes of the first and second sensors based on the observed behavior of the obstacle. Thus, the vehicle obstacle detecting device is configured to predict the existence of an obstacle in the blind spot where the first and second sensors cannot actually detect the obstacle.