A preference degree judging device capable of calculating the degree of preference in consideration of a reproduction method for contents is provided. The preference degree judging device has a reproduction method detecting section (101) for detecting the reproduction method for the contents, a reproduction time of day detecting section (102) for detecting the reproduction start time and the reproduction ending time when the contents are reproduced by the reproduction method, a reproduction time calculating section (103) for calculating the reproduction time of the contents from the reproduction start time and the reproduction ending time, a preference degree calculating section (201) for calculating the preference degree on the basis of the reproduction method and the reproduction time, and a preference degree judging section (204) for judging the preference degree on the basis of the result of the calculation by the preference degree calculating section (201).
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