A mobile terminal, comprising: a middle frame; a main board disposed in the middle frame; a display screen module connected to the main board; and a back plate; the middle frame comprising a front side face, a back side face facing away from the front side face, a left side face and a right side face disposed opposite to each other, and a top face; the display screen module comprising a display screen and a positioning frame covering the periphery of the display screen; the positioning frame being connected to the front side face of the middle frame, the back plate being disposed on the back side face of the middle frame; wherein a receiving groove is defined on a top end of the middle frame, the receiving groove is defined by the top face of the middle frame, the display screen module, and the back plate; the receiving groove extends in a left-right direction, and two opposite ends of the receiving groove extend to the left side face and the right side face of the middle frame respectively; the mobile terminal further comprises a mounting box slideably received in the receiving groove, a first camera connected to the main board is disposed at a side face of the mounting box that faces the display screen module, a front flange is provided at a side of the mounting box that faces the display screen module along the periphery of the mounting box, a back flange is provided at a side of the mounting box that faces the back plate along the periphery of the mounting box, the mounting box is configured to extend out of or retract into the receiving groove so that the first camera is exposed out of or hidden into the receiving groove; when the mounting box is retracted into the receiving groove, the front flange overlies a top end face of the positioning frame and the back flange overlies a top end face of the back plate; and the mobile terminal further comprises a driving device configured to drive the mounting box to extend out of or retract into the receiving groove. a middle frame; a main board disposed in the middle frame; a display screen module connected to the main board; and a back plate; the middle frame comprising a front side face, a back side face facing away from the front side face, a left side face and a right side face disposed opposite to each other, and a top face; the display screen module comprising a display screen and a positioning frame covering the periphery of the display screen; the positioning frame being connected to the front side face of the middle frame, the back plate being disposed on the back side face of the middle frame; wherein a receiving groove is defined on a top end of the middle frame, the receiving groove is defined by the top face of the middle frame, the display screen module, and the back plate; the receiving groove extends in a left-right direction, and two opposite ends of the receiving groove extend to the left side face and the right side face of the middle frame respectively; the mobile terminal further comprises a mounting box slideably received in the receiving groove, a first camera connected to the main board is disposed at a side face of the mounting box that faces the display screen module, a front flange is provided at a side of the mounting box that faces the display screen module along the periphery of the mounting box, a back flange is provided at a side of the mounting box that faces the back plate along the periphery of the mounting box, the mounting box is configured to extend out of or retract into the receiving groove so that the first camera is exposed out of or hidden into the receiving groove; when the mounting box is retracted into the receiving groove, the front flange overlies a top end face of the positioning frame and the back flange overlies a top end face of the back plate; and the mobile terminal further comprises a driving device configured to drive the mounting box to extend out of or retract into the receiving groove.