According to the forest transition theory, in industrially developed countries economic development, civilization and agriculture industrialization can dictate the patterns of changes in forest coverage. It is now known that in 18 and 19 centuries, the primary economic and social development has caused an intense reduction in forest coverage. Following a rapid deforestation a slow increase in forest vegetation has been observed. This theory has been proved in many western countries and a few developing countries such as China. In these countries economical transition with the reduction of forest coverage has been taken about 1 to 2 century after which the deforestation has been stopped in last 2 to 3 decade in twenty century and after that, there was an increment in forest coverage. In this study we tried to express the change of the forest coverage according to the forest transition theory in a part of western forests of Iran. We estimated the rate of deforestation in a mature stand of oak (Quercus brantti Lindl.) using aerial photographs of this area in 1955 and 1990. The results obtained from this study indicate a relatively low rate of deforestation of 0.16 percent annually. The possibility that this low rate of deforestation is due to the forest transition is discussed.