In a sound producing apparatus and a sound producing method of this invention, at least underlying sound representing situations of the place within virtually actualized space and ornamental sound corresponding to object within the virtually actualized space which is not independent of presence or absence of display on a display unit are produced to set virtual sound space corresponding to the virtually actualized space displayed on the display unit. Thus, speech (sound) can be utilized as means for grasping spatial information as in the actual world within the virtually actualized space, and offer of information utilizing speech (sound) can be made. In addition, the advertisement effect can be also increased.