A wireless communication device includes a plurality of antenna elements; a modulation unit modulating signals including data in a plurality of first OAM modes having different real number values; a calculation unit calculating factors indicating weights corresponding to each of the signals in the plurality of first OAM modes modulated by the modulation unit for each of the plurality of antenna elements, based on information indicating a wireless environment of a counter wireless communication device that is a transmission destination of the data; and a transmission processing unit multiplexing each of the signals in the plurality of first OAM modes for each of the plurality of antenna elements by using the factors, and outputting the signals obtained through multiplexing for each of the plurality of antenna elements to each of the plurality of antenna elements.