1. An imaging apparatus having a projector, comprising: an imaging unit that photographs a subject; a mirror image converting unit that converts a live view image photographed by the imaging unit into a mirror image; a projector that projects the mirror image of the live view image in a direction opposite to a photographing direction of the imaging unit; a control unit that initiates actual photography for recording the subject by the imaging unit when a posture of a main subject satisfies a predetermined condition; and a pose image superimposing unit that superimpose a pose image on a projected image, wherein the control unit determines that the predetermined condition is satisfied and performs the actual photography when a superimposition degree of the main subject in the projected image and the pose image is a threshold value or more, and the control unit extracts an outline shape of the main subject in the projected image, and performs enlargement and reduction of the pose image so that a size of the outline shape is coincident with a size of the pose image, wherein the imaging unit photographs a stereoscopic image, and the outline shape is extracted from a subject which is detected using the stereoscopic image and present at the same distance from the imaging apparatus.