Advances in information technology has brought many benefits to businesses, but at the same time, businesses are facing serious problems caused by its use such as information leakage. In order to cope with problems, companies have established information security policies, demanding workers of a company to be compliant with the policies. This study proposes a research model that includes information security awareness, information security attitude, self-efficacy, standard belief and social influences as factors that affect the compliance of information security policy among the workers of shipping and port organization. The results of this study showed that there was a positive relationship not only between the information security awareness and the information security attitude, but also between the information security attitude and the information security policy among the workers of shipping and port organization. It was also found that there was a positive relationship between the self-efficacy and the compliance of information security policy, and between the social influence and the compliance of information security policy. However, there was no meaningful relationship between the standard belief and the compliance of information security policy. This study examined to what extent the workers of shipping and port organization that have a high possibility of the information leakage were compliant with the information security policy. The findings will contribute to organizations of shipping and port who attempt to establish strategies related to information security.