An embodiment may comprise an image forming apparatus comprising: a receiving section which receives a print data; storage which stores the received print data; a print data judging section which judges whether the received print data is a structured document data or not; a controlling section which operates the receiving part preferentially when it is judged that the print data is a structured document data, compared to a case that the print data is a non-structured document data; an image converting section which converts the stored print data to image data; and a printing section which prints the image data to a predetermined recording medium.