This article explores the relative importance of maternal employment as a determinant of pediatric care utilization using data from a 6-month longitudinal study of pediatric clinic use. This study sample (N = 167) was taken from a population of users of a pediatric ambulatory care clinic of a large urban hospital. The clinic served an inner city with a predominantly low-income, working-class population. Independent variables come from personal interviews conducted with the mothers of the preschoolers and from a 4-week health diary. Data on episodic illness care use were obtained from the children's medical records. Results indicate that children of working mothers made fewer visits to the clinic than children of housewives. Somewhat different factors were associated with clinic use for children with employed mothers as compared with children with nonemployed mothers. Findings from multivariate analyses suggested that mother's employment influenced utilization through its relationship with social support and daily stress. Work outside of the home was associated with greater social support as well as greater daily stress. Both social support and stress predicted utilization. Implications of these findings for future research are discussed.