In this article, we report on a study that sought to examine the willingness of pre-service teachers to apply the inclusion policy for students with disability. The study considered the Theory of Planned Behavior (Ajzen, 1985, 1991) as a means to explain the willingness of pre-service teachers in general and of the subgroups to engage in inclusive teaching. Participants were 580 pre-service teachers enrolled in various types of programs in three different teacher education colleges in Israel. They completed a paper copy questionnaire with 55 items. It was constructed according to Theory of Planned Behavior (TBP) guidelines. It was found that the model, based on the TPB, explains the degree of willingness of pre-service teachers to engage in inclusive teaching. It emerges that attitudes toward inclusion, perceptions of social norms regarding inclusion, and a sense of the competence of pre-service teachers to teach inclusive classes explain most of the variance in the willingness to engage in inclusive teaching and serves as leading factors manifesting this willingness. The discussion is focused on the need to increase pre-service teachers' willingness by using this model.