There has been an increasing interest in employee silence over the past ten years. Previous research indicates that employee silence is negatively related to employee performance, employee trust, motivation and morale (Vakola & Bouradas, 2005). However, little research pays attention to the moderating role of personality trait. Therefore, the purpose of this study is to investigate the relationship between locus of control and employee silence, and agreeableness and extraversion serve as moderators in the relationship. This study hypothesizes that locus of control has a positive impact on employee silence, and agreeableness and extraversion will moderate the relationship between locus of control and employee silence. This study adopted quantitative research design and paper-based questionnaires to test the research hypotheses. Samples of this study were 260 full-time employees in the nonprofit organization in Taiwan. IBM SPSS Statistics was used to do the descriptive, correlation and hierarchical regression analysis. Results show that external locus of control is positively and significantly associated with employee silence. Agreeableness strengthens the relationship between external locus of control and employee silence. And Extraversion weakens the relationship between external locus of control and employee silence.

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