A development cartridge, the development cartridge comprising: a photoconductive unit including a photoconductive drum and an interfering portion; and a developing unit including a developing roller having a rotation shaft and coupled to the photoconductive unit to be rotatable to a release position where the developing roller is separated from the photoconductive drum, and to a development position where the developing roller contacts the photoconductive drum to form a development nip; a driving gear, a power transmission member and a bush, wherein the bush is located between the rotation shaft of the developing roller and the rotational power transmission member and is coupled to the rotation shaft of the developing roller, wherein the driving gear has a rotation axis and is provided to be rotatable about the rotation shaft of the developing roller, and wherein the power transmission member is configured to transmit a rotational force of the driving gear to the bush when the driving gear rotates in a first direction and to partially block the rotational force of the driving gear from being transmitted to the bush, so that the bush does not rotate, when the driving gear rotates in the second direction, wherein the development cartridge further comprises a coupler and a switching member being mounted on the rotation shaft of the developing roller to be rotatable about the rotation shaft of the developing roller by being coupled to the coupler, wherein the switching member includes the driving gear, and an elastic member configured to provide an elastic force to maintain the developing unit at the development position, wherein the coupler is couplable to a driving motor provided in a main body of an image forming apparatus, wherein when the coupler is coupled to the driving motor, the coupler is rotatable in at least one of two coupler directions, wherein when the coupler is rotated in the at least one of two coupler directions, the switching member is switched to a first state where the switching member contacts the interfering portion of the photoconductive unit to rotate the developing unit to the release position, and wherein when the coupler is rotated in the other of the at least one of two coupler directions, the switching member is switched to a second state where the switching member is separated from the interfering portion of the photoconductive unit to allow the developing unit to allow the developing unit to rotate to the development position due to the elastic force of the elastic member. a photoconductive unit including a photoconductive drum and an interfering portion; and a developing unit including a developing roller having a rotation shaft and coupled to the photoconductive unit to be rotatable to a release position where the developing roller is separated from the photoconductive drum, and to a development position where the developing roller contacts the photoconductive drum to form a development nip; a driving gear, a power transmission member and a bush, wherein the bush is located between the rotation shaft of the developing roller and the rotational power transmission member and is coupled to the rotation shaft of the developing roller, wherein the driving gear has a rotation axis and is provided to be rotatable about the rotation shaft of the developing roller, and wherein the power transmission member is configured to transmit a rotational force of the driving gear to the bush when the driving gear rotates in a first direction and to partially block the rotational force of the driving gear from being transmitted to the bush, so that the bush does not rotate, when the driving gear rotates in the second direction, wherein the development cartridge further comprises a coupler and a switching member being mounted on the rotation shaft of the developing roller to be rotatable about the rotation shaft of the developing roller by being coupled to the coupler, wherein the switching member includes the driving gear, and an elastic member configured to provide an elastic force to maintain the developing unit at the development position, wherein the coupler is couplable to a driving motor provided in a main body of an image forming apparatus, wherein when the coupler is coupled to the driving motor, the coupler is rotatable in at least one of two coupler directions, wherein when the coupler is rotated in the at least one of two coupler directions, the switching member is switched to a first state where the switching member contacts the interfering portion of the photoconductive unit to rotate the developing unit to the release position, and wherein when the coupler is rotated in the other of the at least one of two coupler directions, the switching member is switched to a second state where the switching member is separated from the interfering portion of the photoconductive unit to allow the developing unit to allow the developing unit to rotate to the development position due to the elastic force of the elastic member.