To provide a device for informing an operator that insurance information has been changed.

This prescription reading device is provided with a patient data base in which information associated with the insurance of the patient and prescription information is stored, an input means for inputting conditions for retrieving the patient registered in the data base, a retrieving means for retrieving the patient from the data base according to an inputted conditions, an optical character reading means for reading the mentioned contents of a prescription, a comparing means for comparing the information associated with the insurance read by the reading means with the retrieved information associated with the insurance of the patient, and a correcting means for updating the information associated with the insurance stored in the data base of the patient to the information associated with the insurance read from the prescription according to the comparison result of the comparing means.