1. A thumbnail generating apparatus comprising: a moving image extracting portion that, within a first certain period of a moving image, extracts each of the images constituting the moving image every a second certain period shorter than the first certain period; a reduction and enlargement ratio calculating portion that integrates each region where there is a face of person included in the images extracted within the first certain period, determines a face display region to be used in common with the first certain period and having the same aspect ratio as the moving image extracted by the moving image extracting portion such that the face display region surrounds each of the integrated regions where there is a face of a person, and calculates a reduction and enlargement ratio of the moving image such that the determined face display region has substantially the same size as a certain display region having the same aspect ratio as the moving image extracted by the moving image extracting portion and previously set where a moving image thumbnail is to be displayed; and a moving image thumbnail generator that reduces or enlarges the moving image based on the calculated reduction and enlargement ratio to generate the moving image thumbnail.