This article investigates links between staff working conditions in children's day care centres ("Kindertageseinrichtungen"--known as "Kitas" in Germany), job satisfaction, commitment and perceived stress at work. Data are based on the nationwide, representative questionnaire survey AQUA ("Arbeitsplatz und Qualität in Kitas"--Workplace quality in children's day care centres), a project conducted by the State Institute of Early Childhood Research in Munich. From the participants' responses (N[subscript total] = 6606) regarding their working conditions, an index was established that permitted a categorisation into three groups of quality. Well-established instruments and scales were used to measure general job satisfaction and commitment. The Effort-Reward Imbalance (ERI) model by Siegrist and colleagues (2004) was used to examine stress at work. Results indicate that staff working under good conditions show higher job satisfaction, higher commitment values and less stress at work. Furthermore, distinct differences could be found between centre directors and staff without a leading function.