A communication apparatus comprises: a sending unit that sends data to a designated destination; a receiving unit that receives a response to the send by the sending unit; a recording unit that records information relating to a send when the send is performed by the sending unit, and associates and records, when a response to the send is further received by the receiving unit, information of a send-source of the response; and a control unit that causes the sending unit to resend data based on information recorded in the recording unit, wherein the control unit causes the sending unit to resend data to a destination indicated by information, among the recorded information, for which a predetermined time has elapsed since the recording and for which a response has not been received by the receiving unit.