This study aims to investigate some antecedents of procrastination behaviors of employees. Within the literature, studies suggest that some individual factors lead employees to procrastinate their jobs at another time. Therefore, big five personality characteristics, self-esteem and self-efficacy are considered as predictors of procrastination behaviors within the scope of the study. For this purpose, the data which were collected from 300 employees from hospitals by the survey method were analyzed using the structural equation modelling. The results of the study indicate that two personality characteristics of big five which are addressed as conscientiousness and neuroticism have a significant effect on procrastination behaviors of employees. In other words, while employees' conscientiousness level has a negative effect on procrastination behavior; neuroticism level has a positive effect on procrastination behavior. However, extraversion and agreeableness have no significant effect on procrastination behavior. In addition, employees' self-esteem levels have a positive and significant effect on procrastination behavior; whereas self-efficacy beliefs have negative and significant effect on procrastination behavior.