The present invention facilitates operations of updating, altering and/or otherwise recomposing the reproduction list of contents data prepared according to the frequency of reproduction, the priority of reproduction, the preference of the user and so on. There is provided a contents data reproduction apparatus for reproducing contents data, which includes a detecting section that detects the external force, a weighting information generating section that generates weighting information, a memory section that stores the weighting information, a reproduction control section that composes a reproduction list of the contents data, a reproduction section that reads out the contents data and reproducing them, and a display section that visibly displays the reproduction list, the reproduction control section recomposing the reproduction list of the contents data, referring to the weighting information, according to the outcome of detection of the detecting section and visibly displaying the reproduction list on the display section.