Abstract: A device for manipulating a mobile computer is proposed. The device includes a case, a number of buttons mounted thereon having switchable contacts, electrical contact elements attached to the computer's touch screen, a metal capacitive plate attached to the case while electrically connected with the switchable contacts, and electric circuits each connected to one corresponding contact element and to the switchable contacts. The switchable contacts are normally disconnected, while, when the respective button is pressed upon by a user, they are connected thereby connecting the contact elements with the metal plate. Preferable parameters and materials of the device's components are also disclosed. Thus, the device allows for manipulating the touch screen without producing mechanical stress thereon. At the same time, the reliability of detection of control signals inputted into the computer is increased.