The purpose of this study is to examine the influence of a childcare worker s adult attachment on parenting stress and the mediation effects of basic psychological need satisfaction. The survey was conducted in Gwangju and Chonnam with 161 childcare workers at a childcare institution. The collected data was analyzed by SPSS 25.0 and SPSS PROCESS macro 3.3. The results are as follows. First, there was a positive correlation between insecure adult attachment and parenting stress. There was a negative correlation between basic psychological need satisfaction and parenting stress. Second, autonomy of basic psychological need satisfaction mediated the relationship between insecure adult attachment and parenting stress.