A developing cartridge comprising: a casing configured to accommodate developing agent therein, the casing having an outer surface; a first gear positioned at the outer surface, the first gear being rotatable about a first axis extending in a first direction; a second gear (200, 200A, 201, 202) positioned at the outer surface, the second gear (200, 200A, 201, 202) being rotatable about a second axis extending in the first direction, the second gear (200, 200A, 201, 202) being rotatable from a first position to a second position in accordance with rotation of the first gear in a state where the second gear (200, 200A, 201, 202) engages with the first gear; a cover positioned at the outer surface; a link movable together with rotation of the second gear (200, 200A, 201, 202), the link including a distal end portion, characterized by the link being pivotally movable relative to the second gear (200, 200A, 201, 202),, the link having: a first state in which the distal end portion is in contact with the cover, the link being in the first state in a state where the second gear (200, 200A, 201, 202) is at the first position; and a second state in which the distal end portion separates from the cover and the link pivotally moves relative to the second gear (200, 200A, 201, 202), the link being in the second state in a state where the second gear (200, 200A, 201, 202) is at the second position; and an urging member (300, 301, 302) engaging with both the second gear (200, 200A, 201, 202) and the link, the urging member (300, 301, 302) providing the first state of the link due to resilient deformation of the urging member (300, 301, 302), the urging member (300, 301, 302) providing the second state of the link by pivotally moving the link relative to the second gear (200, 200A, 201, 202) due to a restoring force of the urging member (300, 301, 302). a casing configured to accommodate developing agent therein, the casing having an outer surface; a first gear positioned at the outer surface, the first gear being rotatable about a first axis extending in a first direction; a second gear (200, 200A, 201, 202) positioned at the outer surface, the second gear (200, 200A, 201, 202) being rotatable about a second axis extending in the first direction, the second gear (200, 200A, 201, 202) being rotatable from a first position to a second position in accordance with rotation of the first gear in a state where the second gear (200, 200A, 201, 202) engages with the first gear; a cover positioned at the outer surface; a link movable together with rotation of the second gear (200, 200A, 201, 202), the link including a distal end portion, characterized by the link being pivotally movable relative to the second gear (200, 200A, 201, 202),, the link having: a first state in which the distal end portion is in contact with the cover, the link being in the first state in a state where the second gear (200, 200A, 201, 202) is at the first position; and a second state in which the distal end portion separates from the cover and the link pivotally moves relative to the second gear (200, 200A, 201, 202), the link being in the second state in a state where the second gear (200, 200A, 201, 202) is at the second position; and a first state in which the distal end portion is in contact with the cover, the link being in the first state in a state where the second gear (200, 200A, 201, 202) is at the first position; and a second state in which the distal end portion separates from the cover and the link pivotally moves relative to the second gear (200, 200A, 201, 202), the link being in the second state in a state where the second gear (200, 200A, 201, 202) is at the second position; and an urging member (300, 301, 302) engaging with both the second gear (200, 200A, 201, 202) and the link, the urging member (300, 301, 302) providing the first state of the link due to resilient deformation of the urging member (300, 301, 302), the urging member (300, 301, 302) providing the second state of the link by pivotally moving the link relative to the second gear (200, 200A, 201, 202) due to a restoring force of the urging member (300, 301, 302).