<p>PURPOSE: A method for transmitting a reference signal is provided to efficiently transceive a reference signal and perform signaling in a wireless communication system with a multi-antenna. CONSTITUTION: A wireless communication system generates a sub frame. The sub frame includes a control area and a data area. The wireless communication system assigns a reference signal to a control channel. The control channel is mapped on the control area. The wireless communication system transmits the sub frame. After the reference signal about the first antenna group is allocated in the control area, the control channel is formed by residual resources.</p>
