To obtain a screen noise removing device and a cathode ray tube display unit capable of increasing a suitable visual distance by preventing scanning lines of a television from being seen as a lateral line noise without deteriorating an image quality.

A noise removal control circuit 35 increases or decreases the length of a beam spot in a vertical direction in a beam spot length control circuit 31, and highlights predetermined vertical space frequency characteristics in a vertical highlighting circuit 39 so as to compensate a vertical space frequency.