Abstract Background: There is rapid technological advances in health care sector, the internet has become available in all aspects of daily life. It is a double-edged sword with its drawbacks. The behaviours of a nurse wasting organizations time for non-work related activities using internet called cyber loafing. When nurses practicing cyber loafing and procrastination leading to a lack of job conscientiousness. Aim: To determine the association between cyber loafing, procrastination and job conscientiousness among head nurses working at Main Mansoura University Hospital. Research Design: Descriptive correlational design. Setting: The study was conducted at main Mansoura University Hospital. Subjects: a sample composed of 135 head nurses working at Main Mansoura University Hospital. Tools: Three structured questionnaire were used; cyber loafing scale, procrastination scale and six factor personality questionnaire. Results: The studied head nurses had moderate level of both procrastination (88.9%) and job conscientiousness (74.8%). However, they had low level of cyber loafing Conclusion: There were significant negative correlations between cyber loafing, procrastination and job conscientiousness. Recommendations: It is recommended that nursing managers should develop clear guidelines, work ethic and policies to limit tasks procrastination. Apply reward and punishment strategy can serve to improve self-control and self-regulation behaviour