To make it easy for a user to find data produced during a telephone call.

A communication device (for instance a smart phone) 1 includes a communication unit 6 for a telephone call and a controller 10. The controller 10, when a telephone call is performed with the communication unit 6 and an application is executed during the call, associates data produced on the basis of a function of the application with information related to the telephone call. In detail, the controller 10 associates the data with information related to the other party of the telephone call included in address book data.