To provide a bookmark which never comes separated to fall down and has a sense of unity with a book.

A stabbing hole (2) is pierced in the upper end central part of a rectangular paper strip (1), a cord (3) having a total length considerably longer than totalized two times a length from the upper end to the lower end of the book and two times a thickness of the book is passed through that hole, and both its ends are joined to make a loop.