Insider abuse has always been a significant threat to information security management in organization. In order to address this issue, in this research we propose whistleblowing as another complementary measure to other existent approaches to strengthen the internal information security management. In particular, we focus on an investigation of employee intention to whistle-blow information security policy (ISP) violation. Drawing on the theory of planned behavior and rational choice theory, we develop a theoretical model to understand the factors at the organizational and individual levels that might influence whistleblowing attitude and whistleblowing intention. Through a survey-based empirical investigation, we anticipate the results to enhance our existing knowledge on management of insider abuse against information security policy within organizations.