1. A portable photographing device, comprising: an image capturing unit; a projecting unit; and a storing unit, wherein the projecting unit is configured to project a projection image into a region which is different from an image capturing region of the photographing unit, the projection image is any of a first image captured by the image capturing unit, a second image related to the first image, and a third image obtained by synthesizing the first image with the second image, the storing unit is configured to store the first image captured during the projection of the projection image, or the first image captured after the projection of the projection image has ended, and the portable photographing device further comprises: a display unit configured to display an identical image to the projection image; and an operating unit configured to receive an user operation for specifying a position in the image displayed on the display unit, wherein the second image is an image indicative of the position which is specified by the user operation.