A musical-score performing apparatus is provided. In the apparatus, a musical-score displaying unit with a displaying screen displays a musical score of music on the displaying screen, the musical score being represented by a form of multiple staffs, and a designating unit is used to designate a position on the displaying screen of the musical-score displaying unit. A play-back controlling unit plays back the music represented by apart or the whole of the multiple staffs of the musical score in accordance with the position designated on the displaying screen.