INFORMATION PROCESSING APPARATUS

An information processing device is provided to realize a small size and slimness of whole information processing device at the same time regardless of large capacity of a battery unit. A display unit(3) receives a display panel(23) and a display panel case(24), which receives the display panel to enable the display panel to display an image and has a projection part at one side, on a first side. A main unit(2) includes an input unit, and a concaved part(11) at a second side. The concaved part has a battery penetration part(12) penetrated to the opposite side from the second face at a second side of the second side and a receiving part(13) receiving the projection part by pivoting the projection part to the penetrating part at the opposite side of the input unit. The penetrating part includes a battery(4) attached from the opposite side. The battery mounted to the penetrating part and the projection part received in the receiving part are placed between the second side to the opposite side. A protrusion part(33) protrudes upward nearly in a square shape from a display side surface(31) and has an upper end of semi-circular shape. The protrusion part(33) has a cavity in which a flexible substrate connected to a glass substrates, the circuit board electrically connected to the flexible substrate and the antenna are disposed.