1. An electronic camera, comprising: an image-capturing unit capturing a subject image and generating an image; a selecting unit continuously selecting a focus detection object area at a time of image-capturing by the image-capturing unit based on the image generated by the image-capturing unit; a displaying unit capable of displaying the image generated by the image-capturing unit; a generating unit cutting out a part corresponding to the focus detection object area from the image generated by the image-capturing unit and generating a tracking object checking image; an overwatching unit overwatching a selection accuracy of the focus detection object area selected by the selecting unit; and a controlling unit displaying on the displaying unit by overlapping a through image for a composition checking based on the image generated by the image-capturing unit and the tracking object checking image at the time of image-capturing by the image-capturing unit, and displaying the tracking object checking image when the selection accuracy becomes lower than a predetermined accuracy.