1. A mobile phone with music reproduction function comprising: a reproduction unit operable to reproduce music data which is recorded in a recording medium; an incoming call detection unit operable to detect an incoming call from outside; a ring tone output unit operable to output a ring tone; and a control unit operable to instruct the reproduction means to perform a fade-out process of reproducing music data, and instructs the ring tone output unit to perform a fade-in process of outputting a ring tone when the incoming call detection unit detects an incoming call while the reproduction unit is reproducing music data.