The present invention provides toner supplying devices, toner supplying processes, and the like that control bulk density of a mixture of toner and gas efficiently thereby enhancing the fluidity of the mixture, and maintaining the high fluidity for a long period. The invention includes a toner supplying device that has a toner containing portion configured to store a toner, a toner outlet configured to discharge the toner from the toner containing portion, a conveying pipe configured to convey the toner, and a gas feeding unit configured to feed a gas. The toner supplying device supplies the toner from the toner containing portion to an image forming unit of an image forming apparatus. A porous member is disposed near the toner outlet, and the gas is fed into the toner containing portion through the porous member.

 
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