Device for holding sheets in a binder which form a folded stack

A binder (1) of a notebook, comprising:

• a folded stack (4) of paper sheets held within the binder;
• and a holding element (3) connected with a spine (2) of the binder (1), wherein the holding element (3) grips behind the innermost paper sheet of the stack (4) at the fold (9), wherein at least one peripheral recess (7) is formed in the stack (4), where a first section (6) of the holding element (3) that extends perpendicularly to the fold (9) enters this peripheral recess (7), and wherein a second section (8) of the holding element (3) that grips behind the innermost paper sheet of the stack (4) has a strand-like design and in a holding position, it borders the fold (9) along an entire length of the fold, wherein the holding element (3s) consists exclusively of an elastic band (29), wherein the holding element (3) comprises a carrier rail (5), which is joined with the spine (2) of the binder (1), and wherein the elastic band forms the first section and the second section and the carrier rail of the holding element.