In a communication apparatus which performs wireless communication over a plurality of lines, a reduction in transmission efficiency is prevented from occurring. A communication apparatus is provided with: a plurality of reception units which receive signals of the same content from an opposed station over a plurality of lines using wireless communication; a quality determination unit which determines qualities of the plurality of lines based on the received signals of the same content; a modulation scheme determination unit which determines a modulation scheme to be used for the wireless communication based on the quality of only a line over which communication is possible when it becomes impossible to perform communication over a line among the plurality of lines; and a transmission unit which transmits information indicating the determined modulation scheme to the opposed station.