To provide an apparatus for automatically turning musical score pages which produces a musical sound data from a musical sound, and turns a page of a musical score on an appropriate timing after obtaining a playing position of the score from the musical sound data and a precedently stored musical score data.

The apparatus 1 for automatically turning musical score pages comprises a musical score data storage part 41 precedently storing a musical score data of a music to be played by a page unit, a musical sound input part 50 inputting a musical sound of the music being played, a musical sound converting part 31 converting the input musical sound to a musical sound data, a musical score data position obtaining part 32 calculating a playing position of the stored musical score data on the basis of the musical sound data, and a musical score page turning part 33 executing a control to turn the pages of the musical score under a predetermined condition.