This study focuses on the relation between levels of group development and three health-related aspects of working life: work satisfaction, emotional exhaustion, and sick leave. This article presents a study with 30 groups in a manufacturing company. Data were collected from 274 group members of the 30 groups, using Group Development Questionnaire, self-reported measures of work satisfaction and emotional exhaustion, as well as company data on occurrence of sick leave occasions. The results indicate a strong relationship between levels of group development and work satisfaction, a moderately strong relation with emotional exhaustion, and a weaker or less clear relation with sick leave. Practical implications are discussed and future research suggested.