Animation production apparatus

1) Field of the Invention In producing an animation by making a combination of basic motions of a moving body, an animation production apparatus acquires a type of each of the basic motions constituting a predetermined motion, acquires spatial data on an object, including the moving body, in a virtual space for each of the basic motions, produces key frames corresponding to each of the basic motions, acquires motion time information for each of the basic motions, produces an animation on the basis of the key frames and the motion time information, stores animation information including the spatial data and the motion time information in a state associated with each of the basic motions, extracts reusable information from the animation information for each of the basic motions at an alteration of an animation, and stores a previously produced motion procedure as a work model. This enables efficient and easy alteration of a produced animation.