A developer supplying apparatus of the present invention includes a toner bottle and a bottle supporting member which supports the toner bottle so that the toner bottle can rotate in a peripheral surface direction. The toner bottle has a bottle-side toner discharging opening for discharging a developer stored therein, and a groove portion for conveying the stored toner toward the bottle-side toner discharging opening by rotation of the toner bottle in the peripheral surface direction. The bottle supporting member has (i) a toner discharging chamber for temporarily storing the toner discharged from the bottle-side toner discharging opening of the toner bottle and (ii) a supporting body-side toner discharging opening for discharging the toner, stored in the toner discharging chamber, by rotation of a scraper of the toner bottle. Thus, it is possible to realize the developer supplying apparatus which can stably supply the toner at high speed.