This study investigates the relationships between educational information-seeking channels, parenting competence, and parental role stress of mothers. We examine whether these relationships appear differently depending on mothers' employment status. Accordingly, 300 mothers of 4th graders of elementary school were selected as participants from 4th year data of the Panel Study on Korean Parent Educational Involvement. Structural equation modeling was adopted, and the significance of mediating effect was verified by bootstrapping. A multigroup analysis was conducted to test the role of mothers' employment status as a moderator. The major findings of the study are as follows. First, mothers who used online and mass media channels as their main information-seeking channels, had higher parenting competence than mothers who mainly used offline channels. As parenting competence increased, parental role stress decreased. Second, this relationship showed different patterns depending on mothers' employment status. For employed mothers, the use of online and mass media channels increased their parenting competence, and reduced parental role stress. For non-employed mothers, the use of online and mass media channels did not have a significant effect: the higher the parenting competence, the lower the parental role stress. Our results highlight the possibility of using online and mass media channels to relieve the stress of parental roles in times when the value and availability of educational information for children is increasing daily. The findings suggest practical directions for supporting employed mothers who are overburdened by performing both parental and professional roles.