Abstract: A toner cartridge includes a housing, a wheel and a grating tube. The housing has a chamber for accommodation of toner, and an outlet in communication between the chamber and the outside. The wheel is rotatably connected the housing. The grating tube is coaxially connected to the wheel and defines several transparent areas and several opaque areas. The grating tube is made of transparent material and covered with several opaque layers defining the opaque areas such that the toner cartridge has the advantages of flexible application, being compatible with different types of image-forming apparatuses, and reducing manufacturing cost.