Developing cartridge including movable plate for moving holder holding electrical contact surface

A developing cartridge comprising:

• a casing configured to accommodate toner therein;
• a developing roller rotatable about a developing axis extending in a first direction, the developing roller being positioned at one end portion of the casing in a second direction crossing the first direction;
• a developing memory having an electrical contact surface facing in a third direction crossing the first direction and the second direction;
• an agitator rotatable about an agitator axis extending in the first direction and configured to agitate the toner accommodated in the casing;
• an agitator gear positioned at one end of the agitator in the first direction and rotatable about the agitator axis together with the agitator;
• a holder holding the electrical contact surface and movable relative to the casing in the third direction between a retracted position and an advancing position, a distance in the third direction between the electrical contact surface and the agitator axis at the advancing position of the holder being greater than a distance in the third direction between the electrical contact surface and the agitator axis at the retracted position of the holder;
• and
• a plate movable relative to the casing between a first position and a second position, the holder being movable from the retracted position to the advancing position in response to a movement of the plate from the first position to the second position, the plate being positioned farther away from the developing roller than the agitator gear and the holder are from the developing roller in the second direction.