A communication apparatus (10) according to the present disclosure includes a transmitting unit (11) configured to transmit a packet to a communication apparatus (20) at the other end through a communication line (31), a transmitting unit (12) configured to transmit a packet to the communication apparatus (20) at the other end through a communication line (32), a packet generation unit (13) configured to generate a plurality of packets by duplicating a packet, a monitoring unit (15) configured to monitor communication states of the communication lines (31, 32), and a control unit (14) configured to determine to transmit two or more of the plurality of duplicated packets to the communication apparatus (20) at the other end by using at least one of the communication lines (31, 32) according to the communication states.