'Rationality' of 'Weber's rational bureaucracy means that men apply criteria of rationality to their action, irrespective of its relation to organizational objectives. But many theorists of organizations take it as 'effectiveness' or 'efficiency'. Consequently, they have missed that rational bureaucracy is "a model of bureaucracy which permits conflict". Tte conflict would occur between two distinct types of authority : (a) authority which rests on "incumbency of a legally defined office" and (b) authority which is based on "technical competence". And Weber's rational bureaucracy is conceptualized on these two types of authority. Weber made two separate statements about the specific nature of the rationality of bureaucracy : " Bureaucratic administration signifies ,authority on the basis of knowledge. This is its specifidally rational character" ; and "Bureaucratic authority is specifically rational in the sense of being bound to discursively analysable rules"., Althouth it has been suggested that Weber assume the absense of any conflict or tension in rational bureaucracy, the problems which concerned Weber were the contradiction between formal and material rationality in modern society, which is a possible conflict between the growth of formal rules and the application of scientific knowledge in the current organizations. And the problems of the conflict would lead to political analyses of organizations.