Positive attitudes of key stakeholders, such as school principals, towards a new policy are considered a necessary pre-requisite to implement any such policy. Hong Kong has recently formulated a policy that supports the integration of students with disabilities into regular schools. This study investigated the attitudes of Hong Kong primary school principals toward integration, with a view to determining if these school leaders are prepared to implement integrated education practices in their schools. A modified version of the School Principals’ Attitudes toward Inclusion scale (Bailey, 2004) was used to collect data from participants. Based on the responses of 130 primary school principals, it was found that their attitudes toward integration were slightly negative. Principals who had less teaching experience and who were administering schools with smaller student enrolment were found to hold more positive attitudes toward integration. The variable of "having a family member or close friend with a disability" had a significant and positive effect on the principals’ attitudes toward integration. Copyright © 2008 by Education Research Institute.