An image display apparatus that detects a picture defect and shifts an image region to eliminate the picture defect. The image display apparatus includes a memory unit that temporarily stores an input image signal, a memory control unit that controls a readout start address for the memory unit, a display unit to which the image signal read out of the memory unit is supplied, a detection unit that detects an aspect ratio of the input image signal, and an address control signal generation unit which receives an output from detection unit and generates a readout start address control signal for the memory unit.