In a printer to which a printer consumable material holder for supplying a printing medium is detachably mounted or in a digital camera which integrally includes this printer, image processes suitable for various printing media capable of being supplied can be performed. To do so, an information memory unit for storing information of the printing media is provided in the printer consumable material holder. In association with this, a unit for receiving the information, and a unit for analyzing the received information and determining an optimum image processing method for performing printing on the printing medium are provided in the printer. In a system structured by combining these units, the optimum image process is automatically adopted on the basis of the information stored in the printer consumable material holder.