Image forming device having shutter driving member

An image forming device comprising:

• a main casing;
• a support member movable in a predetermined direction relative to the main casing between an accommodated position within the main casing and a pulled-out position outside the main casing;
• a plurality of image bearing members supported on the support member and aligned in a line at intervals in the predetermined direction;
• a plurality of developing units provided in one-to-one correspondence with the plurality of image bearing members and supported on the support member;
• a plurality of toner cartridges provided in one-to-one correspondence with the plurality of developing units and detachably mounted on the support member, wherein each of the toner cartridges includes a casing formed with an opening through which toner accommodated in the casing is supplied to a corresponding one of the developing units and a shutter movable between an opening position at which the shutter opens the opening and a closing position at which the shutter closes the opening;
• and
• a shutter closing mechanism that moves the shutter of one of the toner cartridges to be replaced from the opening position to the closing position while maintaining the shutters of the remaining toner cartridges at the respective opening positions.