Purpose: The aim of this study was to explore the relationship between perfectionism dimensions and postpartum depression among parturient women between 2 weeks to 12 months, using the Frost Multidimensional Perfectionism Scale (FMPS). Methods: Participants were 150 women who had their infants examined for health in two public health centers in a city. The participants completed a self-administered questionnaire, which included the FMPS, Postpartum Depression Predictors Inventory-Revised and the Korean version of the Edinburgh Postpartum Depression Scale (K-EPDS). The data were analyzed using independent t-tests and a multiple linear regression. Results: The prevalence of postpartum depression was 43.3% (K-EPDS≥9.5). Multiple regression analysis showed that postpartum depression was significantly associated with parental criticism (β=.21), concern over mistakes (β=.19), postnatal maternal blues (β=.22), history of depression (β=.20), social support (β=.13), marital relationship/satisfaction (β=.14), prenatal anxiety (β=.17), and self-esteem (β=.15, all p values < .05). These variables explained 57.2% of the variance in postpartum depression. Conclusion: Parental criticism and concern over mistakes are personality dimensions that can be exhibited by participants and are therefore associated with the development of postpartum depression in parents of infants. The perfectionism assessment is needed to detect postpartum depression and develop strategies to provide effective and preventive interventions.