A portable electronic device is provided which an operator (photographer) has not an abnormal but favorable feeling from a design (aesthetic) viewpoint and which enables the operator to know an area in which a photograph can be successfully taken or a position of a subject to be photographed. A control section has an auxiliary display section display present time, notification of arrival of data and/or messages, or a like when no photograph is taken. When the operator presses down a photographing mode selecting key, the control section controls a liquid crystal panel so that its all pixels are put into a light transmitting state and causes reflected light from a mirror reflecting plate to be visually viewed by the operator. |