A spatial multiplexing detection device using a MIMO technology comprises a MIMO detector for detecting receive symbols which correspond to symbols transmitted through transmit antennas from receive signals when the transmit data transmitted by the terminal group are received through receive antennas; a terminal identifier for identifying the receive symbols detected by the MIMO detector into symbols which correspond to respective terminals in the terminal group; a symbol demapper for demapping the receive symbols identified by the terminal identifier to binary data which correspond to a modulation method used by the terminal group; and a reverse data processor for performing deinterleaving, decoding of error correction codes, and descrambling on the binary data demapped by the symbol demapper, and detecting receive data of the respective terminals.