A developer collection container includes a developer storing portion having first and second end portions in a longitudinal direction thereof. A developer supply opening is provided on the first end portion through which the developer is supplied into the developer storing portion. A rotation member is rotatably provided so as to extend substantially from the first end portion to the second end portion. The rotation member rotates so as to convey the developer in the longitudinal direction of the developer storing portion. In a first region closer to the first end portion, the rotation member conveys the developer in a direction from the first end portion toward the second end portion with a conveying power which is larger than a conveying power with which the rotation member conveys the developer in a second region closer to the second end portion.