urpose – In contemporary work life, there is need to employees at all levels who share information to improve the organization and report potential problems. Employee voice is one of proactive work behavior meets this need. The aim of this research is examination of serial mediating role of psychological safety and psychological ownership on relationship between conscientousness trait and employee voice behavior.

Design/methodology/approach- In research, relational screening model was used and was conducted on 223 employees in various sectors. Participants were reached by convenience and snowball sampling methods and data was collected with online survey. The serial mediation model was analyzed in SPSS Process Macro. Additionally, correlation analysis was used to examine relationships between variables, Cronbach's Alpha coefficient was calculated to measurements’ reliability, and frequency analysis was performed for demographic information

Findings – According to findings, the employees’ conscientiousness trait positively affects psychological safety and increases their voice behavior. In addition, the conscientiousness trait affects positively employee voice by increasing psychological ownership. The results revealed that conscientiousness trait contributes positively to employee voice by increasing psychological safety and psychological ownership. Thus, a full mediation effect of psychological safety and psychological ownership was found on the effect of conscientiousness on employee voice, and serial mediation model supported.

Discussion – The individuals' ability express ownself comfortably in the working settings and embrace job/institution plays an important on voice behavior. Moreover, to arise significant effect employees' conscientiousness trait on voice behavior requires specific contextual factors. This research provides important contribution both theoretically and applications by addressing employee voice with multi-lev