1. A mobile terminal, comprising: a display module; a first camera including a first image sensor and a second camera including a second image sensor having a larger number of pixels than the first image sensor, the first and second cameras located on a same surface on a same side of the mobile terminal, and configured to generate a stereoscopic 3D image, the first and second cameras respectively including first and second lenses, the second lens having a wider angle than the first lens; and a controller configured to: generate the stereoscopic 3D image using a disparity between first and second images captured through the first and second cameras, respectively, control the display module to display the stereoscopic 3D image generated using the disparity between the captured first and second images respectively corresponding to the first and second cameras located on the same surface on the same side of the mobile terminal, receive a first selection to select between a basic zoom function and a wide zoom function, if the wide zoom function is selected, receive a second selection to select between a zoomed-in mode and a zoomed-out mode, zoom in or zoom out the displayed stereoscopic 3D image according to the zoomed-in mode or the zoomed-out mode, respectively, using the second camera having the wider angle lens than the first lens, and control the display module to display the zoomed-in or zoomed-out stereoscopic 3D image, wherein the zoomed-in or zoomed-out stereoscopic 3D image is displayed on a 3D preview image screen in the display module, and wherein one of the first and second cameras is movable in a horizontal direction to adjust an interval between the first and second cameras.