  In this paper, by using the factorization equation of the ${\cal N}=2$ theory
we study ${\cal N}=1$ supersymmetric SO(N) gauge theory in Argyres-Douglas
points . We suppose that maximal confinement occurs in the system and give a
tree level superpotential. Then, we obtain general Picard-fuchs equations for
glueball superfield which are hypergeometric equations having regular singular
points corresponding to Argyres-Douglas points. Furthermore, we study the
solution of these differential equations and calculate the effective
superpotential. Finally, we study scaling behavior of the chiral operators and
coupling constant around the AD points.
