A binder for a document, comprising a base part, rings fitted to the base part and allowed to change in a closed ring attitude for binding the document and an open ring attitude for opening parts of the closed rings to pass the document therethrough before winding, and a switching mechanism fitted to the base part and switching between the closed ring attitude and the open ring attitude. The switching mechanism further comprises a switching lever swingably fitted to the base part. When the rings are in the open ring attitude, the switch mechanism is set so that the switching lever is allowed to pass through the open portion of the ring. Thus, the binder for the document with easiness of handling and excellent workability can be provided by improving so that only the advantages of a conventional ring type binder and a lever arch type binder can be utilized. |