A cartridge configured detachably mountable to a main body of an image forming apparatus , the cartridge comprising: a first unit including an image bearing member and a first portion ; a second unit including a developer bearing member and a second portion , and rotatably connected to the first unit , the second unit being configured to be movable relative to the first unit by rotating around a rotational axis between (i) a first position where the developer bearing member is in contact with the image bearing member and (ii) a second position where the developer bearing member is separated from the image bearing member and the second portion is in contact with the first portion , wherein the cartridge is configured to be removable from the main body in a state where the first unit takes a removal posture, wherein, in a state where the cartridge is removed from the main body and the first unit takes the removal posture, an own weight of the second unit , as to a center of gravity of the second unit , generates a moment around the rotational axis toward a direction, in which the second unit is moved toward the second position, such that the second unit is located at the second position by the own weight of the second unit , in a case where the second unit is located at the second position, movement of the second unit in a direction, in which the developer bearing member is separated from the image bearing member , is restricted by the second portion coming into contact with the first portion , and a distance between the rotational axis and the second portion in a direction orthogonal to the rotational axis is shorter than a distance between a rotation center of the developer bearing member and the rotational axis. a first unit including an image bearing member and a first portion ; a second unit including a developer bearing member and a second portion , and rotatably connected to the first unit , the second unit being configured to be movable relative to the first unit by rotating around a rotational axis between (i) a first position where the developer bearing member is in contact with the image bearing member and (ii) a second position where the developer bearing member is separated from the image bearing member and the second portion is in contact with the first portion , wherein the cartridge is configured to be removable from the main body in a state where the first unit takes a removal posture, wherein, in a state where the cartridge is removed from the main body and the first unit takes the removal posture, an own weight of the second unit , as to a center of gravity of the second unit , generates a moment around the rotational axis toward a direction, in which the second unit is moved toward the second position, such that the second unit is located at the second position by the own weight of the second unit , in a case where the second unit is located at the second position, movement of the second unit in a direction, in which the developer bearing member is separated from the image bearing member , is restricted by the second portion coming into contact with the first portion , and a distance between the rotational axis and the second portion in a direction orthogonal to the rotational axis is shorter than a distance between a rotation center of the developer bearing member and the rotational axis. <EOS>