A key pad assembly and a mobile communication terminal having the same. The key pad assembly comprises: a key pad installed at a front surface of a cover so as to be exposed outwardly; a switching unit arranged at a rear surface of the cover for generating a signal when the key pad is pressed; a signal transmitting unit electrically connected to the switching unit below the switching unit, for transmitting a signal generated from the switching unit; and a supporting plate arranged below the signal transmitting unit and having a guiding portion for inducing the signal transmitting unit to be bent in a direction spaced from a lower surface of the cover, for supporting the signal transmitting unit towards the cover. As the key pad assembly is implemented to be slim, a spatial efficiency of the mobile communication terminal is increased.