The present invention relates to an apparatus for supporting a function key of a mobile communication terminal. The apparatus includes a flexible printed circuit for electrically connecting a plurality of function keys to the mobile communication terminal, wherein the flexible printed circuit is conformable to a shape of a mounting space the plurality of function keys are mounted in, and a plurality of supporting members, wherein each supporting member corresponds to at least one of the plurality of function keys for supporting the at least one of the plurality of function keys within the mounting space, wherein the flexible printed circuit connects the plurality of supporting members to each other by attaching to a surface of the supporting members.