The present invention relates to an apparatus for automatically turning a page of a book. The apparatus comprises a casing 10 on which a music book 5 can be placed in an opened state; a page holding means 40 which is installed within the casing 10 and holds a page 6 of the opened music book 5 to be turned and a turned page 7 thereof; a page turning means 50 which is installed within the casing 10 to turn a page of the opened music book; a driving means 60 for driving the page holding means 40 and the page turning means 50; a manipulation means 110 for manipulating operations of the driving means 60; and a control unit 130 for controlling the operations of the driving means 60 for turning a relevant page of the music book 5 placed on the casing 10, in response to signals from the manipulation portion 110. The apparatus of the present invention can firmly hold turned pages and pages to be turned by flexibly adapting to changes in the numbers of the pages of the music book that have been already turned and are to be turned and can reliably turn only a relevant page. Further, it is possible to reduce operational noises and failures. In addition, foreign materials can be prevented from being introduced into the casing by using a cover. Furthermore, the apparatus may operate by mans of an internal power supply unit thereof and may be operated in a wireless manner.