1. An imaging apparatus comprising: an imaging unit; a closed-eye detection unit configured to detect a face from an image captured by the imaging unit and to detect whether the detected face has closed eyes; and a control unit configured to determine whether to issue a warning about a captured image to be recorded according to a detection result detected by the closed-eye detection unit for the captured image to be recorded and a detection result detected by the closed-eye detection unit for a preview image captured before the image to be recorded is captured.