The invention relates to an image processing apparatus and a recording medium in order to prevent data loss in the condition of using a virtual memory and realizing power saving of an auxiliary storage device. In the image processing apparatus (1) provided with the memory and the auxiliary storage device used as the virtual memory together with the memory, an idle space calculating portion (102) calculated an idle capacity of a predetermined region set in the memory. A mode determination portion (103) determines a power-saving mode according to whether the idle capacity has a required region ensured for execution of a specific application. Specifically, if not, a first power-saving mode is determined; and if yes, a second power-saving mode in which less power is consumed than in the firstpower-saving mode is determined. Then a power-saving mode application portion (104) applies the determined power-saving mode to the auxiliary storage device.