A cartridge for an electrophotographic printing apparatus comprising: a housing configured to accommodate therein developer; a driving receiving part configured to receive a driving force; a transmission member configured to rotate by receiving a driving force from the driving receiving part; a first rotary member configured to rotate when receiving the driving force from the transmission member; a second rotary member configured to rotate when receiving the driving force from the transmission member; and a detected part configured to move in accordance with the rotation of the second rotary member, characterized in that the first rotary member and the second rotary member are configured to rotate about a same rotational axis, the first rotary member includes a first part configured to move in accordance with the rotation of the first rotary member, and the second rotary member includes a second part abutting on the first part, and is configured to move from a first position, at which an abutting state with the transmission member is released, to a second position, at which the second rotary member abuts on the transmission member and at which the abutment of the first rotary member with the transmission member is released, due to the first part abutting on the second part while the first rotary member is rotated by receiving the driving force due to the first rotary member abutting on the transmission member, and the detected part is configured to move in accordance with the rotation of the first rotary member, and then, after the second rotary member has reached the second position, move in accordance with the rotation of the second rotary member. a housing configured to accommodate therein developer; a driving receiving part configured to receive a driving force; a transmission member configured to rotate by receiving a driving force from the driving receiving part; a first rotary member configured to rotate when receiving the driving force from the transmission member; a second rotary member configured to rotate when receiving the driving force from the transmission member; and a detected part configured to move in accordance with the rotation of the second rotary member, characterized in that the first rotary member and the second rotary member are configured to rotate about a same rotational axis, the first rotary member includes a first part configured to move in accordance with the rotation of the first rotary member, and the second rotary member includes a second part abutting on the first part, and is configured to move from a first position, at which an abutting state with the transmission member is released, to a second position, at which the second rotary member abuts on the transmission member and at which the abutment of the first rotary member with the transmission member is released, due to the first part abutting on the second part while the first rotary member is rotated by receiving the driving force due to the first rotary member abutting on the transmission member, and the detected part is configured to move in accordance with the rotation of the first rotary member, and then, after the second rotary member has reached the second position, move in accordance with the rotation of the second rotary member.