  The strength of the dynamically generated Yukawa coupling among composite
fields is calculated. The system of N=1 supersymmetric SU(2) gauge theory with
massive three flavors is considered as an example. We use the techniques of
"integrating in" the gluino-gluino bound state in the low energy effective
theory and the instanton calculation and Shifman-Vainshtein-Zakharov sum rule
(QCD sum rule) in the fundamental theory. The obtained value of the Yukawa
coupling is of the order of unity. The method which is developed in this paper
can be applied to the other supersymmetric gauge theories.
