A developing cartridge comprising: a casing configured to accommodate developing agent therein; a developing roller rotatable about a first axis extending in a first direction, the casing having one end portion and another end portion in the first direction, the casing also having one end portion in a second direction crossing the first direction, the developing roller being positioned at the one end portion of the casing in the second direction, and the developing roller having a peripheral surface a portion of which is exposed to an outside of the casing in the second direction; and a first shaft extending in the first direction and movable relative to the casing and the developing roller in the first direction between a first position and a second position, the first shaft being also movable in the second direction together with the casing and the developing roller, a first inclined surface inclined with respect to the first direction and movable in the first direction together with the first shaft, the first inclined surface being inclined to be distant from the first shaft in the second direction as extending from the another end portion of the casing in the first direction toward the one end portion of the casing in the first direction; a second shaft extending in the first direction and positioned closer to the another end portion of the casing in the first direction than the first shaft is to the another end portion of the casing in the first direction, the second shaft being movable relative to the casing and the developing roller in the first direction between a third position and a fourth position, the second shaft being also movable in the second direction together with the casing and the developing roller; a second inclined surface inclined with respect to the first direction and movable in the first direction together with the second shaft, the second inclined surface being inclined to be distant from the second shaft in the second direction as extending from the another end portion of the casing in the first direction toward the one end portion of the casing in the first direction; and a link mechanism connecting the first shaft to the second shaft, the link mechanism being configured to shift between a first state and a second state, wherein the link mechanism is shifted to the first state to render the second shaft to be at the third position in a case where the first shaft is at the first position, and wherein the link mechanism is shifted to the second state to render the second shaft to be at the fourth position in a case where the first shaft is at the second position. a casing configured to accommodate developing agent therein; a developing roller rotatable about a first axis extending in a first direction, the casing having one end portion and another end portion in the first direction, the casing also having one end portion in a second direction crossing the first direction, the developing roller being positioned at the one end portion of the casing in the second direction, and the developing roller having a peripheral surface a portion of which is exposed to an outside of the casing in the second direction; and a first shaft extending in the first direction and movable relative to the casing and the developing roller in the first direction between a first position and a second position, the first shaft being also movable in the second direction together with the casing and the developing roller, a first inclined surface inclined with respect to the first direction and movable in the first direction together with the first shaft, the first inclined surface being inclined to be distant from the first shaft in the second direction as extending from the another end portion of the casing in the first direction toward the one end portion of the casing in the first direction; a second shaft extending in the first direction and positioned closer to the another end portion of the casing in the first direction than the first shaft is to the another end portion of the casing in the first direction, the second shaft being movable relative to the casing and the developing roller in the first direction between a third position and a fourth position, the second shaft being also movable in the second direction together with the casing and the developing roller; a second inclined surface inclined with respect to the first direction and movable in the first direction together with the second shaft, the second inclined surface being inclined to be distant from the second shaft in the second direction as extending from the another end portion of the casing in the first direction toward the one end portion of the casing in the first direction; and a link mechanism connecting the first shaft to the second shaft, the link mechanism being configured to shift between a first state and a second state, wherein the link mechanism is shifted to the first state to render the second shaft to be at the third position in a case where the first shaft is at the first position, and wherein the link mechanism is shifted to the second state to render the second shaft to be at the fourth position in a case where the first shaft is at the second position.