Precise control of cell division plane is essential for organogenesis, particularly in plants in which cells lack the ability to migrate. It has long been believed that preprophase band is the determinant of cell division plane in flowering plants. This paper presents mutants that specifically lack the preprophase band. Unexpectedly, the phenotype of the mutants was rather weak, only a small fluctuation in cell division orientation, and the organ development of the mutants was almost normal. We will discuss the function of preprophase band and the potential mechanism underlying cell division control in plant organogenesis.