PURPOSE: A keypad assembly of a portable terminal is provided to extend space for arranging key tops by including a combination member combined with an inner wall of a housing unit in a terminal. CONSTITUTION: An operating member(221) is changed according to the operation of a user. The operating member operates key witch units. A combination member(223) is arranged on an upper surface of the operating member. A combination piece(241) covers a side of the operating member at a boundary of the combination member. A controlling member(225) is arranged on the upper side of the combination member. The controlling member includes one or more key tops. The combination piece is combined on the inner wall of a housing unit in a terminal.
