A process cartridge (PY, PM, PC, PK) detachably mountable to a main assembly of image forming apparatus, the process cartridge comprising: a first unit including an image bearing member; a second unit including a developer carrying member, the second unit being rotatably connected with the first unit so as to be movable between a contact position in which the developer carrying member contacts the image bearing member and a spaced position in which the developer carrying member is spaced from the image bearing member; and a force receiving portion (44b, 44h) engageable with an engageable member (61, 71) provided in the main assembly of the apparatus to receive from the engageable member a force for moving the second unit from the contact position to the spaced position, the force receiving portion being provided on the second unit, wherein the process cartridge is configured such that, when the process cartridge is mounted to the main assembly and the second unit is in the contact position, the image bearing member and the force receiving portion are positioned on a downward side of the process cartridge, the process cartridge being characterized in that the process cartridge is configured such that, when the process cartridge is mounted to the main assembly and the second unit is in the contact position, the force receiving portion faces upwardly towards a side where a rotational axis of the second unit is provided with respect to a tangential line to the force receiving portion as seen along the axial direction of the developer carrying member, such that the engageable member and the force receiving portion are pulled to each other when engaging with each other. a first unit including an image bearing member; a second unit including a developer carrying member, the second unit being rotatably connected with the first unit so as to be movable between a contact position in which the developer carrying member contacts the image bearing member and a spaced position in which the developer carrying member is spaced from the image bearing member; and a force receiving portion (44b, 44h) engageable with an engageable member (61, 71) provided in the main assembly of the apparatus to receive from the engageable member a force for moving the second unit from the contact position to the spaced position, the force receiving portion being provided on the second unit, wherein the process cartridge is configured such that, when the process cartridge is mounted to the main assembly and the second unit is in the contact position, the image bearing member and the force receiving portion are positioned on a downward side of the process cartridge, the process cartridge being characterized in that the process cartridge is configured such that, when the process cartridge is mounted to the main assembly and the second unit is in the contact position, the force receiving portion faces upwardly towards a side where a rotational axis of the second unit is provided with respect to a tangential line to the force receiving portion as seen along the axial direction of the developer carrying member, such that the engageable member and the force receiving portion are pulled to each other when engaging with each other.