A developing device (4Y, 4M, 4C, 4K) comprising: a developer carrying member configured to carry a developer containing toner and a carrier in order to develop an electrostatic latent image formed on an image bearing member (1Y, 1M, 1C, 1K); a developing container including a first chamber configured to supply the developer to said developer carrying member, a second chamber partitioned from said first chamber by a partition wall, a first communication portion configured to permit communication of the developer from said first chamber to said second chamber, and a second communication portion configured to permit communication of the developer from said second chamber to said first chamber; a first feeding screw provided in said first chamber and configured to feed the developer in a first direction from said second communication portion to said first communication portion; and a second feeding screw provided in said second chamber and configured to feed the developer in a second direction from said first communication portion to said second communication portion; wherein said second feeding screw includes, a rotation shaft; a first blade portion (46a, 46b) helically formed on an outer peripheral surface of said rotation shaft and configured to feed the developer in the second direction, a second blade portion helically formed on the outer peripheral surface of said rotation shaft and configured to feed the developer in the second direction, and a third blade portion helically formed on the outer peripheral surface of said rotation shaft and configured to feed the developer in the second direction, characterized in that, when said second feeding screw is seen in a direction perpendicular to a rotational axis thereof, said first blade portion (46a, 46b) and said second blade portion overlap with each other, said second blade portion and said third blade portion do not overlap with each other and form a gap between each other with respect to a rotational axis direction, and said third blade portion and said first blade portion (46a, 46b) overlap with each other, and wherein a volume of said second blade portion is not more than 75 % of said first blade portion (46a, 46b) between an upstream end portion of said second blade portion and an upstream end portion of said third blade portion with respect to the second direction. a developer carrying member configured to carry a developer containing toner and a carrier in order to develop an electrostatic latent image formed on an image bearing member (1Y, 1M, 1C, 1K); a developing container including a first chamber configured to supply the developer to said developer carrying member, a second chamber partitioned from said first chamber by a partition wall, a first communication portion configured to permit communication of the developer from said first chamber to said second chamber, and a second communication portion configured to permit communication of the developer from said second chamber to said first chamber; a first feeding screw provided in said first chamber and configured to feed the developer in a first direction from said second communication portion to said first communication portion; and a second feeding screw provided in said second chamber and configured to feed the developer in a second direction from said first communication portion to said second communication portion; wherein said second feeding screw includes, a rotation shaft; a first blade portion (46a, 46b) helically formed on an outer peripheral surface of said rotation shaft and configured to feed the developer in the second direction, a second blade portion helically formed on the outer peripheral surface of said rotation shaft and configured to feed the developer in the second direction, and a third blade portion helically formed on the outer peripheral surface of said rotation shaft and configured to feed the developer in the second direction, characterized in that, when said second feeding screw is seen in a direction perpendicular to a rotational axis thereof, said first blade portion (46a, 46b) and said second blade portion overlap with each other, said second blade portion and said third blade portion do not overlap with each other and form a gap between each other with respect to a rotational axis direction, and said third blade portion and said first blade portion (46a, 46b) overlap with each other, and said first blade portion (46a, 46b) and said second blade portion overlap with each other, said second blade portion and said third blade portion do not overlap with each other and form a gap between each other with respect to a rotational axis direction, and said third blade portion and said first blade portion (46a, 46b) overlap with each other, and wherein a volume of said second blade portion is not more than 75 % of said first blade portion (46a, 46b) between an upstream end portion of said second blade portion and an upstream end portion of said third blade portion with respect to the second direction.