A developing apparatus comprising: a developer accommodating container having a replenishing portion in which a developer including a toner and a carrier is accommodated, and provided for replenishing the developer, and a discharging portion for discharging the accommodated developer; said developer accommodating container being separated into a first accommodating portion and a second accommodating portion by a partition wall; the first accommodating portion and the second accommodating portion being communicated with each other by communication portions (18a, 18b) in both end sides; and the developing apparatus being structured such as to move in a circulating manner the accommodated developer while agitating, by means of a first feeding member arranged in the first accommodating portion and a second feeding member arranged in the second accommodating portion, wherein said communication portions (18a, 18b) are communicated below a supposed lowest height of a liquid surface of the developer, wherein the discharging portion of said developer accommodating container is arranged in a downstream side in a feeding direction of the developer by any one of said feeding members (12, 13), wherein said feeding member (12, 13) is provided with a backflow portion flowing back a feeding direction of the developer in an upstream side of the discharging portion with respect to the feeding direction of the developer, and wherein the communication portion (18a, 18b) formed in said discharging portion side is formed in a further upstream side of said backflow portion, characterized in that: the feeding member is a feeding screw, the feeding screw is structured such that spiral blades (13b, 13c, 13d), which comprise a first blade, a second blade and a third blade, are provided around a rotating shaft, the feeding screw is inserted into the second accommodating portion, the second blade is formed in such a manner that its spiral direction is inverted to that of the first and third blades (13b, 13d), on the basis of a rotational drive of the feeding screw, the first blade feeds the developer from the communication portion side to the communication portion side, and feeds it to the developing roller, the second blade is positioned in a downstream side of the communication portion in an upper stream side of the developer discharge port, with respect to a feeding direction of the developer by the first blade, and in that the second blade is arranged to apply an inverted force to the developer fed by the first blade so as to limit an amount discharged to the developer discharge port, and makes the developer flow into the first accommodating portion via the communication portion, and in that the third blade is arranged to discharge the developer getting over the second blade to the developer discharge port. said developer accommodating container being separated into a first accommodating portion and a second accommodating portion by a partition wall; the first accommodating portion and the second accommodating portion being communicated with each other by communication portions (18a, 18b) in both end sides; and the developing apparatus being structured such as to move in a circulating manner the accommodated developer while agitating, by means of a first feeding member arranged in the first accommodating portion and a second feeding member arranged in the second accommodating portion, wherein said communication portions (18a, 18b) are communicated below a supposed lowest height of a liquid surface of the developer, wherein the discharging portion of said developer accommodating container is arranged in a downstream side in a feeding direction of the developer by any one of said feeding members (12, 13), wherein said feeding member (12, 13) is provided with a backflow portion flowing back a feeding direction of the developer in an upstream side of the discharging portion with respect to the feeding direction of the developer, and wherein the communication portion (18a, 18b) formed in said discharging portion side is formed in a further upstream side of said backflow portion, characterized in that: the feeding member is a feeding screw, the feeding screw is structured such that spiral blades (13b, 13c, 13d), which comprise a first blade, a second blade and a third blade, are provided around a rotating shaft, the feeding screw is inserted into the second accommodating portion, the second blade is formed in such a manner that its spiral direction is inverted to that of the first and third blades (13b, 13d), on the basis of a rotational drive of the feeding screw, the first blade feeds the developer from the communication portion side to the communication portion side, and feeds it to the developing roller, the second blade is positioned in a downstream side of the communication portion in an upper stream side of the developer discharge port, with respect to a feeding direction of the developer by the first blade, and in that the second blade is arranged to apply an inverted force to the developer fed by the first blade so as to limit an amount discharged to the developer discharge port, and makes the developer flow into the first accommodating portion via the communication portion, and in that the third blade is arranged to discharge the developer getting over the second blade to the developer discharge port.