The present invention relates to an image processing device for compressing and expanding image data by means of the JPEG method when the image data is subjected to a moving image recording operation or a moving image reproducing operation, wherein the image is compressed so that positions of a block noise in a first frame image and a block noise in a second frame image are different in the moving image recording operation, while the image data is JPEG-expanded and then image-displayed based on information relating to the difference of the block noise obtained in the moving image recording operation when the moving image recorded in the moving image recording operation is reproduced.