To provide a portable image reproducing apparatus capable of changing thumbnail display of dynamic images according to types of supplied power sources.

Power to be consumed is reduced as much as possible by displaying reproduced images of contents selected by a user in the thumbnail display of an index picture by animations when an external power source by an AC adapter, etc. is used, displaying the thumbnail display of the index picture as static images when the power is supplied by a primary battery attached to the apparatus body or a rechargeable battery, stopping a decoding operation of an animation decoder when the power is supplied from a battery and displaying thumbnail images on the index picture at the time of an operation by the rechargeable battery.

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