Abstract: An identifying film for an optical code contains a book including a flexible substrate fitted thereon, and the flexible substrate including: at least one displaying area having a plurality of dots arranged therein, and each dot including various information; at least one selecting area having a number of different dot positions arranged therein; thereby, the reader allows to select the desired item on the basis of requirement, and selected data are judged via the dots in the displaying area by using other reading devices so as to generate different display effects, hence the identifying film is portable easily by reader to read more contents and information in different display types.