This study investigates the relationship between employees' personality traits and their knowledge sharing (KS) attitude and behavior. A questionnaire was developed and completed by 368 hotel employees working in the five star hotels in Cairo. The results revealed a significant positive relationship between hotel employees KS attitude, behavior and just two aspects of personality traits, namely agreeableness and conscientiousness. Also, there were significant positive relationships between openness to experience and both of knowledge collecting behavior and overall KS behavior. These results might extend existing literature on knowledge management and present empirical evidence on the personal dispositions which may affect knowledge sharing.