The communication device according to the present invention includes a communication condition detection unit that detects communication conditions with regard to communication with other communication devices, a link adaptation decision-making unit that makes a decision as to whether or not link adaptation needs to be executed in correspondence to the communication conditions, a link adaptation parameter selection unit that selects a link adaptation parameter to be used for the link adaptation when the link adaptation is judged to be necessary, a transfer rate decision-making unit that makes an advance decision as to whether or not the data transfer rate is to become, lower compared to the pre-link adaptation state if the link adaptation is executed based upon the selected link adaptation parameter and a link adaptation unit that executes the link adaptation based upon the selected link adaptation parameter if the data transfer rate is judged not to become lower.