The invention aims to provide a multifunction personal computer/mobile phone capable of being used both as a mobile phone and as a mobile personal computer, to improve input operability when used as a mobile phone as well as a personal computer, and to retain a compact form when it is not used. A multifunction personal computer/mobile phone is so configured that a left keyboard, a display and a right keyboard are mounted on a hinge so that they are folded and unfolded freely, wherein on the left and right keyboards, key indications for digits, characters, symbols or the like for personal computer use are arranged, and on either of the keyboards, key indications for digits, characters, symbols or the like for mobile phone use are arranged so that the hinge is at the far end from a user, wherein the display is formed rotatably with respect to the keyboard, and the left and right keyboards are spread to a position where the surfaces of the keyboards are horizontal.