A mobile terminal and a method of selecting a lock function thereof are provided. The method of selecting a lock function of a mobile terminal having a touch screen includes: measuring, when at least one touch occurs on the touch screen, at least one of a pressure, a current, and a capacitance of an area of the touch screen in which the touch occurs; and selecting, if at least one of the measured pressure, current, and capacitance is greater than or equal to a preset value, a lock function. Thus, by touching the touch screen in such a manner that a high current or capacitance may be measured in a specific area of the mobile terminal, a user can easily perform a desired function, thereby improving user convenience.