To provide an image display apparatus to display an image of a subject based on a classification of the subject, wherein a complicate operation by an operator is not required and set up mistake can be reduced easily.

A mark position detecting means 10 detects a position L of the mark which is disposed at the prescribed position of each classification V of the subject in the image P of the subject and a classification of the subject discriminating means 20 discriminates the classifications V of the subject based on the detected position L, then an image display means 30 displays the image P of the subject at the prescribed position of each classification V on a screen based on the classification V.