This article deals with changes of Iranian family in the process of its demographic transition. A global theoretical approach was constructed for this study. In this approach, in addition to local conditions and factors, external forces of globalization were also considered to be at work, changing Iranian family. Because different social groups, with different predisposition, have been differentially exposed to and interacted with external forces, one can simultaneously find families that - with respect to type, style of formation, age at marriage and level of childbearing-regarding western experience, belong to non-simultaneous social contexts. Nevertheless, the general trend of Iranian family change has been towards nuclear family, less stability, increased age at marriage and lower level of childbearing.It was inferred that, prior to the completion of its demographic transition, Iranian society has already partially started its second demographic transition.Given the gaining pace of communication revolution and increasing proportion of Iranian users of modern means of communication, especially internet, it is also inferred that changes in Iranian family will even get faster in future. It was therefore suggested that, for more effective study of Iranian family's stability and change, (1) Statistical Center of Iran adopts currently used classification of households and provide adequate family statistics, and (2) some eligible universities undertake to set up "community and family study center".