A mobile terminal (100, 200), comprising: a first body (110, 210), comprising a main body portion (112, 212), a first extension (114, 214), a second extension (116, 216), a first functional component and a second functional component (118,218), the main body portion (112, 212) being connected between the first extension (114, 214) and the second extension (116, 216), the first functional component being disposed on the first extension (114, 214), and the second functional component (118,218) being disposed on the second extension (116, 216); and a second body (120,220), being slidably stacked on the first body (110, 210) and selectively sliding to a first position, a second position, or a third position, wherein when the second body (120,220) is at the first position, the second body (120,220) covers the main body portion (112, 212), the first functional component and the second functional component (118,218), when the second body (120,220) is at the second position, the second functional component (118, 218) is exposed, when the second body (120,220) is at the third position, the first functional component is exposed; characterized in that the first body (110, 210) comprises a sliding slot, a first positioning portion, a second positioning portion and a third positioning portion, the sliding slot is parallel to a longitudinal direction of the main body portion (112, 212), the first, the second and the third positioning portions (1151, 1152 and 1153) are positioning slots, communicated with the sliding slot, and are arranged along a sliding direction of the second body (120, 220) with respect to the first body (110, 210); wherein the second body (120,220) comprises a positioning protrusion cooperating with the sliding slot and a positioning block disposed on the positioning protrusion and selectively engaging with one of the first, the second and the third positioning portions (1151, 1152 and 1153), and the positioning block is an elastic protruded column. a first body (110, 210), comprising a main body portion (112, 212), a first extension (114, 214), a second extension (116, 216), a first functional component and a second functional component (118,218), the main body portion (112, 212) being connected between the first extension (114, 214) and the second extension (116, 216), the first functional component being disposed on the first extension (114, 214), and the second functional component (118,218) being disposed on the second extension (116, 216); and a second body (120,220), being slidably stacked on the first body (110, 210) and selectively sliding to a first position, a second position, or a third position, wherein when the second body (120,220) is at the first position, the second body (120,220) covers the main body portion (112, 212), the first functional component and the second functional component (118,218), when the second body (120,220) is at the second position, the second functional component (118, 218) is exposed, when the second body (120,220) is at the third position, the first functional component is exposed; characterized in that the first body (110, 210) comprises a sliding slot, a first positioning portion, a second positioning portion and a third positioning portion, the sliding slot is parallel to a longitudinal direction of the main body portion (112, 212), the first, the second and the third positioning portions (1151, 1152 and 1153) are positioning slots, communicated with the sliding slot, and are arranged along a sliding direction of the second body (120, 220) with respect to the first body (110, 210); wherein the second body (120,220) comprises a positioning protrusion cooperating with the sliding slot and a positioning block disposed on the positioning protrusion and selectively engaging with one of the first, the second and the third positioning portions (1151, 1152 and 1153), and the positioning block is an elastic protruded column.