A waste toner collecting system in an image forming equipment which forms on the surface of an image carrier an electrostatic latent image corresponding to an original image, visualizes the latent image with toner and transferrs the toner image onto a copying material. The waste toner collecting system comprises a cleaning unit for removing residual toner on the image carrier after the toner image has been transferred, a container, indepen­dent of the cleaning unit, for storing the removed waste toner, a transport device for conveying the waste toner removed by the cleaning unit to the container, an outlet formed in the toner transport device so as to discharge the waste toner, a waste to­ner inlet formed in the container at the position corresponding to the outlet in the toner transport device, and shutter members provided for the outlet and the inlet, respectively, the shutter members being opened or closed according as the container is mounted or dismounted.