This research is aimed at explaning why the family planning policy as a part of the so-called reproductive revolution in Thailand has been successfully implemented. It is found that the success of the policy implementation can be explained by two levels of factors, namely structural contexts and policy actors. On the one hand, the structural contexts in Thailand, i.e. the bureaucratic-authoritarian state, the capitalist mode of production and the ideology of development have stimulates the need for limiting family size among Thai people and consequently brought about their adoption of family planning program in both rural and urban areas. On the other hand the tri-partite alliance-a group of policy actors from the Thai bureauaracy, the private sector and the foreign circle has used its birth control ideology in pushing for the success of the policy implementation. By both structural forces and actors' pressure, the family planning goal is finally accomplished.
