In the past few decades, post-democratization politics in South Korea have witnessed an upsurge in authoritarian nostalgia, called the “Park Jung-hee syndrome." This paper examines the origins of public noslalgia for the authoritarian dictator by putting two theoretical arguments, i.e.t the socialization thesis and the system output thesis, to an empirical test. This paper utilizes the 2010 Korea Democracy Barometer from the Korea Barometer and the 2010 and the 2015 Korean National Identity Survey from the East Asia Institute. The empirical analysis of the South Korean case strongly supports the political socialization argument suggesting that cilizens’ yearning for Park Jung-hee is not merely an outcome of the negative evaluations of the democratic governments’ performances. Rather, their authoritarian nostalgia is in large part an outcome of their political socialization during the Park dictatorship. The analysis implies that, although a resurgence of the Park Jung-hee syndrome in post-democra-tization South Korea is not expected to derail the country s route to democratic deepening, it may continue to he a main source of political division in partisan and electoral politics in the future.