Drawing on 264 leadermember matching questionnaires in China, this study found that OrganizationBased Self Esteem (OBSE) fully mediates the relationship between overinvestment employment and mutual investment employment relationship modes and helping behaviors. Comparing to the overinvestment employment relationship, mutualinvestment has greater positive effect on OBSE. Meanwhile, we found that individual traditionality plays the moderating roles between the two modes and OBSE. Specifically, for high traditionality employees, the impact of the two modes on OBSE is weaker. Contrarily, the above effect is stronger for lowly traditional employees.