News information diffusion Process has been investigated in a variety of settings and in regard to various types of news since 1945 When Delbert C. Miller investigated the flow of the death of Roosebelt in a college Population. For example, Otto N. Larsen and Richard J. Hill investigated the diffusion of news about the death of Senator Robert A. Taft. Richard J. Hill and Charles M. Bonjean, and Bradely S. Greenberg examined the diffusion of news about the Kennedy Assassination. M. Timothy O'keefe investigated the diffusion of the knowledge of the frist human heart transplant among doctors. Asgar Fathi investigated the diffusion of the news of marriage of Prime minister Trudeau in Canada. Kenneth G. Sheinkopf and M. Timothy O'keefe studied the diffusion of the news of Eagleton Affair. These studies has contributed to our knowledge on such points as which media provide initial and supplementary information, how long it takes for the news to flow to various segments of the population or total population, and what role personal source plays in news diffusion process. It was Deutschmann and Danielson who first suggest that the diffusion process was a regular process. They have compared the diffusion of three news diffusion process, and integrated their findings with earlier diffusion studies. The conclusion of this comparison was that "the diffusion process was far more regular than we suspected." Some of the regularities suggested by them were the following; 1. Time of day, nature of the story and other factors do not seem to alter the gross results very much. 2. The diffusion curves follow about same pattern. 3. Television plays a major role in delivering important news, with radio ranking second, and newspapers tended primarily to supplement the broadcast reports. But, with respect to these regularities of the diffusion process, modification must be introduced. These regularities are influenced by impact of news or news value of the story. The direction of this influence is suggested by Hill and Bonjean as the following; 1. The greater the news value of an event, the more important will be interpersonal communication in the diffusion procees. 2. The greater the news value of an event, the more rapid will be the diffusion. However, it seems that news value factor influences not only the diffusion speed and channels by which news reaches to the public, but also the degree of the knowledge gap between socioeconomic segments of the population. It appears that socio-economic segment differences with respect to the information level, that is knowledge gap, tend to be decreased in the case of diffusion of a event of great news value. Thus, news value factor can be considered to be the very important factor in the news diffusion process. But, It seems that the way how news value factor operate on the news diffusion has not yet been explained. A tentative model of the process by which news value factor opertes on the news diffusion is suggested in this article.