A document binder includes an intermediate connecting board mounted between a bottom board and a faceplate. Thus, the intermediate connecting board has a type and a specification that can be changed to make a document binder having different specifications and types, thereby enhancing the versatility of the document binder. In addition, both of the bottom board and the faceplate have a determined specification, so that the manufacturer only needs to change the specification of the intermediate connecting board to make a document binder having different specifications. Further, the document binder consists of the bottom board, the faceplate and the intermediate connecting board which have different colors, types and patterns, thereby enhancing the aesthetic quality of the document binder.