To provide a clip for exclusive use for retaining a book/a notebook/a musical score which is mounted with a rubber and is thin and small so that pages of the book/the notebook/the musical score can be simply retained so as not to be turned up, and when the page is closed, the page can be picked up at once and the clip is kept out of the way.

The clip can be kept out of the way by making a clip main body 1 thin and small. The clip 2 to be fitted on a cover paper is mounted on the clip main body 1 so that it is firmly fixed on the cover paper. In addition, by mounting a rubber 3 for retaining the page on the clip main body 1, a turned-up page can be easily retained, and it makes to be convenient that even when the book is closed, the retained page can be picked up at once. Even when the book is left as it is opened, it does not close by itself by using the clip.