Toner supply device and image forming apparatus

A toner supply device comprising:

• a toner cartridge that contains toner;
• a device body that allows the toner cartridge to be attached thereto and detached therefrom;
• and
• a pressing portion that presses the toner cartridge such that the toner cartridge is detached from the device body, wherein
• one of the toner cartridge and the device body has an engaging portion, and the other of the toner cartridge and the device body has a guiding portion that guides the engaging portion in an attachment operation of attaching the toner cartridge to the device body and a detachment operation of detaching the toner cartridge from the device body.
• the guiding portion has
• an attachment path that extends in a moving direction of the toner cartridge and guides the engaging portion in the attachment operation, and
• a lock portion provided at a position deviated from the attachment path in an innermost portion of the guiding portion, and
• when the engaging portion moving in the attachment path along with the attachment operation reaches the innermost portion, the engaging portion is engaged with the lock portion by the pressing portion pressing back the toner cartridge, allowing the toner cartridge to be attached to the device body so as not to be detached therefrom.