A feeding device for feeding a developer, comprising: an accommodating member for accommodating the developer; a first feeding member , provided rotatably in said accommodating member , for feeding the developer in a first feeding direction (W), the first feeding member being provided with a first helical portion (87b1) having a first diameter; and a second feeding member , provided rotatably in said accommodating member , for feeding the developer being fed by the first feeding member in a second feeding direction (X) crossing the first feeding direction (W), the second feeding member being provided with a second helical portion ; characterized in that the first feeding member includes a first region (87b1) and a second region (87b2) in a named order with respect to the first feeding direction (W), the first region (87b1) being provided with the first helical portion (87b1), and the second region (87b2) being provided with a small diameter portion (87b2, 97c) having a second diameter smaller than the first diameter, wherein the second region (87b2) is provided between the first region (87b1) and a position where said first feeding member and said second feeding member cross each other, and the feeding device further comprises a wall provided in said accommodating member and extending in a direction from the small diameter portion (87b2, 97c) toward said second feeding member so that said wall is spaced with an increasing distance in said second feeding direction (X) from said first feeding member along said first feeding member with respect to the first feeding direction (W) to branch a flow path (G) of the developer. an accommodating member for accommodating the developer; a first feeding member , provided rotatably in said accommodating member , for feeding the developer in a first feeding direction (W), the first feeding member being provided with a first helical portion (87b1) having a first diameter; and a second feeding member , provided rotatably in said accommodating member , for feeding the developer being fed by the first feeding member in a second feeding direction (X) crossing the first feeding direction (W), the second feeding member being provided with a second helical portion ; characterized in that the first feeding member includes a first region (87b1) and a second region (87b2) in a named order with respect to the first feeding direction (W), the first region (87b1) being provided with the first helical portion (87b1), and the second region (87b2) being provided with a small diameter portion (87b2, 97c) having a second diameter smaller than the first diameter, wherein the second region (87b2) is provided between the first region (87b1) and a position where said first feeding member and said second feeding member cross each other, and the feeding device further comprises a wall provided in said accommodating member and extending in a direction from the small diameter portion (87b2, 97c) toward said second feeding member so that said wall is spaced with an increasing distance in said second feeding direction (X) from said first feeding member along said first feeding member with respect to the first feeding direction (W) to branch a flow path (G) of the developer. <EOS>