This paper considers on the Problem of Necessity in Spinoza's Ontology. For that reason, mainly on human attitude toward fate, we consider this problem. In the first place, way of appearing of Fortune is examined in reliance on KUKI Shūzō 's doctrine, and I show that Fortune is a cause to let a human being hold the strong imagination which cannot escape easily so that it does not give room accepting other thoughts in its mind. In the second place, through considering Leibniz’s criticism of Spinoza, I clarify Fortune’s two faces, and confirm Spinoza’s argument that human beings cannot judge Fortune freely. Then finally, I examine the problem of acknowledgement of Fortune with the above-mentioned results. It is basic analysis of real existence and elucidation of time as imagination. In conclusion, considering Fortune along Spinoza's thought, reaching the problem of the grace of God necessarily is shown.