Previous research has demonstrated a considerable correlation between job satisfaction and life satisfaction. In addition, various researchers have hypothesized that job importance (work involvement) should be a moderator of this relationship. However, most empirical tests did not confirm this assumption. We argue that job importance cannot turn out to be a moderator because the subjective importance of work is already part of job–satisfaction judgments, a notion that has been advanced by Locke (1969) as implicit importance weighting. However, a suppressor effect can be predicted because job importance should be correlated with job satisfaction, but not life satisfaction. In a study of recently hired incumbents (N= 811) in a large German electronics company, we distinguished between job involvement and work involvement. We considered the latter, but not the former, being a measure of job importance. Work involvement, but not job involvement, turned out to be a suppressor of the relation between job satisfaction and life satisfaction.