A cartridge comprising: a housing configured to accommodate therein developer; a driving receiving part configured to receive a driving force; a transmission gear configured to rotate by receiving the driving force from the driving receiving part and transmit the driving force from the driving receiving part to a toothless gear, the transmission gear including an engaging part, the toothless gear configured to rotate by receiving a driving force from the transmission gear, and a detected part configured to be moved by the rotation of the toothless gear, wherein the toothless gear is configured to rotate from a primary driving state where the driving force from the driving receiving part is transmitted to the toothless gear to a stopped state where the transmission of the driving force from the driving receiving part to the toothless gear is released, and then is configured to rotate from the stopped state to a secondary driving state where again a driving force from the driving receiving part is transmitted to the toothless gear, wherein the toothless gear includes: a teeth part, in the primary driving state and the secondary driving state, facing the transmission gear in a diametrical direction of the toothless gear and contacting the transmission gear, a toothless part, in the stopped state, facing the transmission gear in the diametrical direction and separate from the transmission gear in the diametrical direction, and an engaged part, in the stopped state, being abutted on by the engaging part of the transmission gear being rotated to thus rotate the toothless gear to the secondary driving state, wherein the teeth part includes: a first teeth part, in the primary driving state, facing the transmission gear in a diametrical direction of the toothless gear and contacting the transmission gear, and a second teeth part arranged at an interval from the first teeth part at an upstream side in the rotating direction and, in the secondary driving state, facing the transmission gear in a diametrical direction of the toothless gear and contacting the transmission gear, and wherein the toothless part includes: a first toothless part arranged downstream from the first teeth part in the rotating direction, and a second toothless part arranged between the first teeth part and the second teeth part in the rotating direction and, in the stopped state, facing the transmission gear in the diametrical direction and separate from the transmission gear in the diametrical direction. a housing configured to accommodate therein developer; a driving receiving part configured to receive a driving force; a transmission gear configured to rotate by receiving the driving force from the driving receiving part and transmit the driving force from the driving receiving part to a toothless gear, the transmission gear including an engaging part, the toothless gear configured to rotate by receiving a driving force from the transmission gear, and a detected part configured to be moved by the rotation of the toothless gear, a teeth part, in the primary driving state and the secondary driving state, facing the transmission gear in a diametrical direction of the toothless gear and contacting the transmission gear, a toothless part, in the stopped state, facing the transmission gear in the diametrical direction and separate from the transmission gear in the diametrical direction, and an engaged part, in the stopped state, being abutted on by the engaging part of the transmission gear being rotated to thus rotate the toothless gear to the secondary driving state, a first teeth part, in the primary driving state, facing the transmission gear in a diametrical direction of the toothless gear and contacting the transmission gear, and a second teeth part arranged at an interval from the first teeth part at an upstream side in the rotating direction and, in the secondary driving state, facing the transmission gear in a diametrical direction of the toothless gear and contacting the transmission gear, and a first toothless part arranged downstream from the first teeth part in the rotating direction, and a second toothless part arranged between the first teeth part and the second teeth part in the rotating direction and, in the stopped state, facing the transmission gear in the diametrical direction and separate from the transmission gear in the diametrical direction.