A communication terminal (100) includes a type identifying unit (102) that identifies a type of user-to-user communication means corresponding to a user's operation which is detected by an operation detection unit (101), a data acquisition unit (103) that acquires communication media data of a user of the communication terminal itself, corresponding to the identified type of user-to-user communication means, and a transmission unit (104) that transmits type request information indicating the type of user-to-user communication means and the communication media data to a partner communication terminal, and the type identifying unit (102) determines a range of types of user-to-user communication means to which switching is allowed from a type of current user-to-user communication means, in accordance with a status of response from the partner communication terminal with respect to the type request information transmitted to the partner communication terminal.