Albeit the pervasiveness of studies on emotional labor and burnout, a causal relationship between them remains unidentified. The purpose of this study is to reexamine these issues and suggest some clues for resolving it. For this, the study raised two presuppositions: First, it is necessary to consider psychological aspects of EL to objectively predict consequences of it; Second, a configurational validity of MBI-HSS should be verified as a standardized measurement instrument to establish theoretical foundation of causal structure between EL and burnout. An empirical analysis was designed by multi-sampling methods and data were analyzed by multi-group CFA and SEM to verify factorial and structural invariance across multi-sample(airline cabin attendants and casino employees). The results revealed two significant findings: First, consequences of emotional labor of hospitality service workers are not same across different samples and this uncasuality is salient in emotive efforts; Second, two dimensions without reduced personal accomplishment of MBI-HSS are more valid than three dimensions. Based on these results, theoretical implications were discussed through by suggesting an alternative theoretical model.