The present invention provides a ventilating and illuminating apparatus. The ventilating and illuminating apparatus includes a ventilating fan, a connecting frame, an illuminating device and a connecting shaft. The ventilating fan has a housing. The connecting frame is connected to the housing and has a mounting portion and a fastening hole. The fastening hole is disposed on the mounting portion. The illuminating device has an illuminating element and a through hole. The connecting shaft partially passes through the through hole of the illuminating device and the fastening hole of the connecting frame and is mounted on the mounting portion of the connecting frame, so as to fasten the illuminating device on the mounting portion of the connecting frame.