A process cartridge detachably mountable to an image forming apparatus main body, said process cartridge comprising: an image bearing member; a charging member for charging the image bearing member; a developing member for developing an electrostatic latent image formed on the image bearing member; a first unit having the image bearing member; a second unit swingably supported by said first unit and having said developing member; and said process cartridge is characterized by further comprising charging member releasing means (57, 58, 65) reducing a contact pressure of said charging member against said image bearing member or separating said charging member from said image bearing member, in case said charging member releasing means (57, 58, 65) receives a force from an acting portion, wherein in case said acting portion imparts no force to said charging member releasing means (57, 58, 65), said charging member is in contact with said image bearing member, wherein said first unit and said second unit are arranged to can relatively assume a first swinging attitude, a second swinging attitude, and a third swinging attitude in accordance with their swinging angles, wherein in case said first swinging attitude is assumed, said developing member is held in contact with said image bearing member, and said charging member releasing means (57, 58, 65) receives no force from said acting portion, wherein in case the second swinging attitude is assumed, the developing member is separated from said image bearing member, and said charging member releasing means (57, 58, 65) still receives no force from said acting portion, and wherein in case said third swinging attitude is assumed, said developing member is separated from said image bearing member, and said charging member releasing means (57, 58, 65) receives a force from said acting portion. an image bearing member; a charging member for charging the image bearing member; a developing member for developing an electrostatic latent image formed on the image bearing member; a first unit having the image bearing member; a second unit swingably supported by said first unit and having said developing member; and said process cartridge is characterized by further comprising charging member releasing means (57, 58, 65) reducing a contact pressure of said charging member against said image bearing member or separating said charging member from said image bearing member, in case said charging member releasing means (57, 58, 65) receives a force from an acting portion, wherein in case said acting portion imparts no force to said charging member releasing means (57, 58, 65), said charging member is in contact with said image bearing member, wherein said first unit and said second unit are arranged to can relatively assume a first swinging attitude, a second swinging attitude, and a third swinging attitude in accordance with their swinging angles, wherein in case said first swinging attitude is assumed, said developing member is held in contact with said image bearing member, and said charging member releasing means (57, 58, 65) receives no force from said acting portion, wherein in case the second swinging attitude is assumed, the developing member is separated from said image bearing member, and said charging member releasing means (57, 58, 65) still receives no force from said acting portion, and wherein in case said third swinging attitude is assumed, said developing member is separated from said image bearing member, and said charging member releasing means (57, 58, 65) receives a force from said acting portion.