The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term evolution (LTE). An apparatus and a method for performing beamforming by using an antenna array in a wireless communication system are provided. The apparatus includes at least one antenna array comprising antenna elements, a control unit configured to determine a number of beams to be formed through the at least one antenna array, and a communication unit configured to adjust paths associated with the antenna elements in order to configure as many antenna subsets as the number of the beams, and to form at least one beam through at least one antenna subset configured from the at least one antenna array.