There has been hitherto a few number of analitical studies on historical sources of the Ataturk era (1923-1938). Whereas due to vivid academical interest to the era, the literature on this subject has been extending; new memoirs, biographies and studies concerning the era are being published. However there has been no increase in studies that analyse those sources according to the methodology of history. It is important in terms of scientific development that the permanent renewal of assessments of historical sources considering the interaction between the theories and the sources which are two important ranks of the science of history. In this study, historical sources of the Ataturk era are examined in a critical way under five categories that are official publications, periodicals, biographies, memoirs - diaries, references and research respectively.