To provide an information processor such as a word processor and a personal computer to which a scanner is attachable/detachable even in a state in which a display part is opened to a main body and to provide a miniaturized information processor.

This information processor is provided with a main body 11 and a display part 13 to be opened and closed to the top surface of the main body 11, a scanner 20 is arranged between a pair of rotational axis parts 15 of the display part 13 and the scanner 20 is attachably/detachably arranged when the display part 13 is in both of opened and closed state.