A communication apparatus comprises: a first processing unit configured to perform processing of a first layer; and a second processing unit configured to perform processing of a second layer which is provided to be upper than the first layer. The second processing unit is configured to perform communication by using a first component carrier included in a licensed band and perform communication by using a second component carrier included in an unlicensed band. The first processing unit is configured to perform communication by using the first component carrier and performs communication by using an element carrier selected from among a plurality of element carriers associated with the second component carrier.