In this study, our purpose is to identify a causal relationship in receptivity relating to the public involvement for current road improvement projects in Korea. Some of hypotheses about causal relationships among the psychological factors are assumed to develop a structural equation model. This model includes latent variables determining the receptivity relating to public involvement procedure, such as distrust feeling for administration (public sector), the knowledge and satisfaction about the road project, and the comprehensive faculty on the public involvement. The estimated model indicates that these assumed hypotheses are proved and that the administrative distrust strongly determines the receptivity as well as understanding of the road project and the knowledge of PI procedure.