Image forming apparatus

An image forming apparatus comprising:

• a toner cartridge including a toner storage portion configured to store toner, a discharge opening communicating with the toner storage portion, and an information holding portion;
• a rotary including a developing roller, a developing-side storage portion configured to store toner to be supplied to the developing roller, and an attached portion to which the toner cartridge is attached, the rotary being configured to take a replacement posture in which attachment and detachment of the toner cartridge to and from the attached portion are allowed;
• and
• a reading portion configured to read information from the information holding portion,
• wherein the discharge opening faces up in a vertical direction when the toner cartridge is attached to the attached portion of the rotary in the replacement posture,
• wherein the developing-side storage portion includes an inlet opening to receive toner from the toner cartridge and is configured such that an opening direction of the inlet opening is horizontal in a case where the rotary is rotated to a first angle in a predetermined direction from the replacement posture, and
• wherein in a case where the toner cartridge is attached to the attached portion, the reading portion is configured to read the information from the information holding portion before the rotary is rotated beyond the first angle in the predetermined direction from the replacement posture.