Provided is a transmitter for continuously and sequentially transmitting data with a variable unit for playback. Further, the ophthalmic imaging apparatus determines acknowledgement or dis-acknowledgement of capturing a still image based on temporal variation of the acquired photometric values or distribution of the acquired photometric values on a fundus image. At least one cylindrical roller from two adjacent cylindrical rollers is rotated about its axis by a drive system, the distance between two adjacent cylindrical rollers being less than or equal to the diameter of a cylindrical container, such that the cylindrical surface of said container can bear on the cylindrical surface of two adjacent cylindrical rollers. The toner supply controller controls a toner amount based on a result by the sensor mechanism. The elastic member elastically deforms in a direction that the stopping portion engages the engaging portion when a load is applied to the hook main portion in a direction that the hook main portion opens.