An image signal recording apparatus includes a first storage device arranged to receive image data and to temporarily store the image data inputted, and a second storage device which has a moving part arranged to record on a recording medium the image data temporarily stored at the first storage device. The apparatus is arranged such that, in moving the moving part of the second storage device after receipt of an instruction for starting to input the image data, the timing of starting the movement of the moving part of the second storage device is controlled according to the state of a power supply or a type of power supply which supplies electric power to portions of the apparatus. The apparatus thus can be simply arranged to be capable of continuously and stably recording image data by consuming only a small amount of electric energy.