1. A photographing apparatus comprising: a photographing module which simultaneously photographs a range including a main subject and at least an eye part of a photographer; an image processor which acquires image data by executing an image process on an output signal of the photographing module; a line-of-sight direction determination circuit which determines a line-of-sight direction of the photographer by comparing a main subject line-of-sight direction of the photographer with a reference line-of-sight direction of the photographer in the image data acquired by the image processor, wherein the reference line-of-sight direction is a line-of-sight direction of the photographer when the photographer looks at the photographing apparatus or a display associated with the photographing apparatus, and wherein the line-of-sight direction determination circuit sets the line-of-sight direction of the photographer as the reference line-of-sight direction when the line-of-sight direction of the photographer is in a direction of the photographing apparatus, and does not set the line-of-sight direction of the photographer as the reference line-of-sight direction when the line-of-sight direction of the photographer is not in a direction of the photographing apparatus; a main subject determination circuit which determines the main subject to be photographed which exists on an extension line of the line-of-sight direction determined by the line-of-sight direction determination circuit and when the line-of-sight direction of the photographer is not in a direction of the photographing apparatus or a display associated with the photographing apparatus, wherein the main subject line-of-sight direction of the photographer is a line-of-sight direction of the photographer when the photographer looks at the main subject and not at the photographing apparatus or a display associated with the photographing apparatus; wherein the light-of-sight direction is changed from the reference line-of-sight to the main subject line-of-sight through setting a reference position based on the location of a nostril part of the photographer or a pupil position of the photographer and determining a direction of view based on a difference from the reference position; an emphasis processor which processes the image data to display the main subject in the image data with emphasis when the main subject line-of-sight exists on the extension line of the line-of-sight of the photographer; and a display module which displays an image corresponding to the image data and a determination result of the main subject determination circuit and with emphasis of the main subject determined by the main subject determination circuit.