A vehicle acceleration suppression device includes an obstacle relative distance detector configured to detect a relative distance between a vehicle and an obstacle, a drive force manipulation amount detector configured to detect a drive force manipulation amount that is a manipulation amount of an accelerator pedal, a steering manipulation amount detector configured to detect a steering manipulation amount that is the manipulation amount of the steering manipulation element, and a drive force limit unit configured to limit the drive force of the vehicle to a predefined drive force limit value, depending on the steering manipulation amount detected by the steering manipulation amount detector, when the relative distance detected by the obstacle relative distance detector is equal to or shorter than a predefined limiting relative distance and the drive force manipulation amount detected by the drive force manipulation amount detector exceeds a predefined drive force manipulation amount threshold.