A developing cartridge comprising: a casing configured to accommodate developing agent (T) 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 positioned at the outer surface , the second gear being rotatable about a second axis extending in the first direction, the second gear 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 engages with the first gear ; a cover positioned at the outer surface ; a link movable together with rotation of the second gear , the link including a distal end portion , characterized by the link being pivotally movable relative to the second gear , , 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 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 , the link being in the second state in a state where the second gear is at the second position; and an urging member engaging with both the second gear and the link , the urging member providing the first state of the link due to resilient deformation of the urging member , the urging member providing the second state of the link by pivotally moving the link relative to the second gear due to a restoring force of the urging member . a casing configured to accommodate developing agent (T) 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 positioned at the outer surface , the second gear being rotatable about a second axis extending in the first direction, the second gear 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 engages with the first gear ; a cover positioned at the outer surface ; a link movable together with rotation of the second gear , the link including a distal end portion , characterized by the link being pivotally movable relative to the second gear , , 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 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 , the link being in the second state in a state where the second gear 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 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 , the link being in the second state in a state where the second gear is at the second position; and an urging member engaging with both the second gear and the link , the urging member providing the first state of the link due to resilient deformation of the urging member , the urging member providing the second state of the link by pivotally moving the link relative to the second gear due to a restoring force of the urging member . <EOS>