1. An imaging apparatus comprising: an imaging portion which takes images of subjects; an instruction portion which gives an instruction to synthesize two taken images; a first specification portion which specifies, as a first taken image, a taken image first shot by the imaging portion after the instruction given by the instruction portion or a taken image last shot by the imaging portion before the instruction given by the instruction portion; a second specification portion which specifies a second taken image having a predetermined relation to the first taken image; a facial image extraction portion which extracts a facial image from one taken image of the two taken images including the first taken image and the second taken image; and a synthesizing portion which synthesizes the facial image extracted by the facial image extraction portion with a region of the other taken image of the two taken images where there is no facial image.