Hierarchical and flat organizational types are predominant in Spain and Sweden, respectively. To study how managers' commitment and work overcommitment (WOC) affect employee well-being, and job perception in these different countries can shed insight on how to improve eldercare organization. The purpose of this paper was to study the association between eldercare employee exposure to managers' commitment and WOC, and employee mental well-being and job perception and how these associations differed between Spain and Sweden.A questionnaire with validated questions on commitment, WOC, mental well-being and job perception, operationalized as the perception of quality of care and turnover intent, was sent out to eldercare managers and employees in Spain and Sweden. -Tests, and linear regression were applied to study the associations and differences between the countries.Interaction analyses revealed that Spanish employees' mental well-being and job perception were influenced by their managers' commitment and WOC in that manager commitment improved and WOC impaired well-being and job perception. However, the Swedish eldercare employees were not influenced by their managers on these parameters.The impact of managerial commitment and WOC differed between employees in Spain and Sweden, possibly because the preconditions for leadership varied due to differences in organizational type.This study compares the managers' impact on employee health and job perception in two countries with different organizational prerequisites. Moreover, managers' commitment and WOC were estimated by the managers themselves and did not rely on the employees' perception, which improved ecological validity.