An electrophotographic image forming apparatus comprising: a main body; a development cartridge detachably received in the main body, the development cartridge including a photoconductive member and a developing roller facing the photoconductive member; a development nip control member moveably arranged on the development cartridge such that the development nip control member is moveable between a first position and a second position, the development nip control member causing the photoconductive member to be separated from the developing roller when the development nip control member is in the first position, the development nip control member allowing the photoconductive member to be in contact with the developing roller when the development nip control member is in the second position; characterized in that: the apparatus includes a position switching member (620, 640) arranged in the main body, the position switching member (620, 640) causing the development nip control member, when initially provided in the first position, to move from the first position to the second position when the development cartridge is detached from the main body; and the position switching member (620, 640) is operable such that: when the development cartridge is then remounted into the main body, the position switching member (620, 640) is arranged so as to not interfere with the development nip control member when the development nip control member is in the second position such that the development nip control member is retained in the second position to thereby retain contact between the photoconductive member and the developing roller. a main body; a development cartridge detachably received in the main body, the development cartridge including a photoconductive member and a developing roller facing the photoconductive member; a development nip control member moveably arranged on the development cartridge such that the development nip control member is moveable between a first position and a second position, the development nip control member causing the photoconductive member to be separated from the developing roller when the development nip control member is in the first position, the development nip control member allowing the photoconductive member to be in contact with the developing roller when the development nip control member is in the second position; characterized in that: the apparatus includes a position switching member (620, 640) arranged in the main body, the position switching member (620, 640) causing the development nip control member, when initially provided in the first position, to move from the first position to the second position when the development cartridge is detached from the main body; and the position switching member (620, 640) is operable such that: when the development cartridge is then remounted into the main body, the position switching member (620, 640) is arranged so as to not interfere with the development nip control member when the development nip control member is in the second position such that the development nip control member is retained in the second position to thereby retain contact between the photoconductive member and the developing roller. the apparatus includes a position switching member (620, 640) arranged in the main body, the position switching member (620, 640) causing the development nip control member, when initially provided in the first position, to move from the first position to the second position when the development cartridge is detached from the main body; and the position switching member (620, 640) is operable such that: when the development cartridge is then remounted into the main body, the position switching member (620, 640) is arranged so as to not interfere with the development nip control member when the development nip control member is in the second position such that the development nip control member is retained in the second position to thereby retain contact between the photoconductive member and the developing roller. when the development cartridge is then remounted into the main body, the position switching member (620, 640) is arranged so as to not interfere with the development nip control member when the development nip control member is in the second position such that the development nip control member is retained in the second position to thereby retain contact between the photoconductive member and the developing roller.