To make it possible to perform normal reception in a transition period in which mapping information is changed.

A mapping information change unit 34 switches a selection destination of a selection unit 33 so as to select a mapping information storage unit 31 (storage unit) in which mapping information showing the same content as that of a partner communication device is stored at the same change timing as that of the partner communication device. A frame creation unit 35 creates a communication frame to which first and second types of signals are mapped on the basis of mapping information in the storage unit selected by the selection unit 33, where the communication frame includes change information showing that the mapping information has been changed, after change timing. A frame division unit 36 distinguishes and extracts the first and second types of signals from the communication frame on the basis of mapping information in a storage unit selected by the selection unit 33 when change information is included in a communication frame received after the change timing, and on the basis of mapping information in a storage unit having been selected before the selection unit 33 has switched a selection destination when the change information is not included.