An imaging apparatus which is thin in thickness and has enough strength to be able to be accommodated in the breast pocket of one's shirt or back pocket of one's pants or in a handbag without bothered by a feeling of strangeness is provided. The imaging apparatus is composed of an imaging unit and an operation unit, both units being connected rotatably relative to each other by a hinge mechanism and formed into a low-profile, rectangular shape in the normal state in which the units are positioned parallel to each other. The operation unit is composed of an upper and a lower cover, a main board having a memory slot and an accommodation part for a flat type battery respectively on both flat faces thereof is contained inside the covers, the main board being supported by a main board supporting part or parts provided at a corner or corners inside the covers, a display is located on the memory slot side, and a control board of the imaging unit is located sideward adjacent to the battery accommodation part of the main board.