To provide an electronic musical score having higher convenience by effectively using a computerized performance information, by displaying various additional information on the computerized musical score in a visually understandable way.

A PC(personal computer) 10 which constitutes the electronic musical score display device is provided with a musical score generating part 102, an additional information generating part 103, a display selection part 105, and a synthesis display part 107. Inputted performance information PI is processed in the musical score generating part 102, and musical score information SI is generated. The information PI is processed in the additional information generating part 103, and additional information AI is generated. In the display selection part 105, the selection which additional information AI is displayed among a plurality of pieces of information is carried out, and the selected additional information AI and the score information SI are combined and displayed on the monitor 11.