1. A plasma display apparatus which includes a plasma display panel whose display surface is formed by multiple pixels; a tuner that receives a television signal of the desired frequency via an antenna and selects only the required signals from the received television signal to output analog picture signals; an analog/digital conversion circuit that inputs said analog picture signals from said tuner and converts them to digital signals with predetermined signal level range corresponding to each signal level; a picture signal processor that performs the predetermined digital picture signal processing for said converted digital signals; a frame memory that stores inputs said produced digital picture signals and at the same time stores digital picture signals to form one frame of image; a scaler that performs the predetermined scaling according to the display screen; a plasma display panel driver that displays said image on said plasma display panel; and a microcomputer to control these devices, said plasma display apparatus comprising: a frame shift processor consisting of said scaler that shifts, by several pixels, the image to be displayed on said plasma display panel in one of the up, down, left, and right directions; a state detection processor consisting of a motion detector that determines the difference between frames based on the digital picture signals stored in said frame memory, and detect the amount of motion of said image; and an automatic shift-time adjusting processor that sets shorter the shift time interval for said image, as the degree of motion decreases and the brightness of the image increases, based on the degree of motion and the brightness of the image detected by said state detection processor.