The present invention relates to the technical field of communications devices and discloses a mobile communications device. The mobile communications device has a rectangular housing and a touchscreen. The housing has a bonding surface configured to bond with the touchscreen, one end of the bonding surface that is provided with a control button and the other end opposite to the end that is provided with a control button are each provided with a supporting surface, the touchscreen is adhered to the supporting surfaces, and two opposite side surfaces of the housing are each connected to the touchscreen in a sealed manner by using a sealing piece. The two opposite side surfaces are side surfaces that are perpendicular to a frame line of the end of the bonding surface that is provided with a control button. Beneficial effects of the present invention are as follows: A sealing piece is used to connect a housing and two sides of a touchscreen, so adhesion location of a frame and the touchscreen is improved, and a width of the frame is effectively reduced, thereby further achieving a narrow-frame effect of a mobile communications device, which is beneficial to a display effect of the mobile communications device; and the housing and the two sides of the touchscreen are sealed by using the sealing piece, waterproof, dust-proof, and antistatic functions and the like are achieved.