1. An image pick-up apparatus, in which plural sorts of shooting modes are prepared, comprising: an image pick-up unit for shooting an object to obtain an image; a setting unit for selecting and setting one of the plural sorts of shooting modes; a recording unit for recording the plural sorts of shooting modes each associated with one of a first file format and a second file format, wherein the first file formal is used for an image file of a single image and the second file format is used for an image file of plural images, when the image file of images obtained in the shooting modes is produced; and a controlling unit for controlling the image pick-up unit to shoot an object to obtain an image in the shooting mode set by the setting unit, and for producing an image file of the image obtained by the image pick-up unit under the control, which image file has one of the first image format and second image format corresponding to the shooting mode set by the setting unit.