To solve problems in reading a book by eliminating a trouble to move a bookmarker whenever a book reading is interrupted, by preventing a reader from being at a loss to know how far he/she is through with it when closing a book on the way of reading, with the bookmarker following page feeding.

The bookmarker body is fixed to a book by holding, from the upper side, the final page of a book between a base part 3 and a cutout 1 for fixing the bookmarker to a book. Then, the bookmarker 2 is placed on an open page, allowing the bookmarker 2 to follow page feeding with its elasticity.