1. A moving image generating apparatus comprising: a processor and a memory having a program recorded thereon to be executed by the processor to control operation of an imaging section and a control section; the control section being configured to: generate plural types of image files containing recording time information by causing the imaging section to perform digital imaging processing and store the plural types of digital image files in the memory, extract a plurality of corresponding still images from the plural types of digital image files stored in the memory, based on a plurality of timings specified by predetermined time intervals, and generate a moving image having frames acquired by the extracted plurality of still images being arranged in time-series, wherein the control section: judges whether an already-generated moving image has been recorded in the memory, and when judged that an already-generated moving image has been recorded in the memory, excludes the recorded moving image from an extraction target from which still images are to be extracted and generates a moving image.