An apparatus and method are provided for transmitting control information and data in a DFT based communication system. The method includes placing a reference signal onto a first symbol among a plurality of symbols in one slot; placing a HARQ-ACK onto a second symbol first placed after the first symbol in the one slot; placing the data onto other symbols except for the first symbol; and transmitting a signal including the reference signal, the HARQ-ACK and the data. A part of CQI information is further placed onto at least one symbol, except for the first symbol, in case that the CQI information is present for transmission in the one slot.