A sound output device provided in a vehicle includes: an obtainer that obtains a drive state of the vehicle; a generator that generates a simulated vehicle sound signal based on the drive state obtained; an outputter that outputs the simulated vehicle sound signal generated; a determiner that determines that a first wheel of the vehicle is free spinning when the drive state obtained suddenly changes; and a corrector that corrects the simulated vehicle sound signal generated based on the drive state that has suddenly changed, when the determiner determines that the first wheel is free spinning. The outputter outputs the simulated vehicle sound signal corrected.