In this essay, I investigated in what sense we can take Spinoza as precursor of Nietzsche by comparing Spinoza's philosophy to Nietzsche's thought. Both Spinoza and Nietzsche maintain monism on the condition of denying teleology and even mechanism. Furthermore, Nietzsche's 'over man' has, like Spinoza's 'free man', the virtues such as highmindness, courage, tolerance, and friendship. Besides, they both deny freedom of will, the moral world-order, the unegoistic, and evil. In this way, both of them have the same framework, and they ultimately give us the same massage; their divergences are, as Nietzsche said, due to differences in time, culture, and science. Yet, in Korea, the research on Nietzsche's relation with Spinoza has not been attempted. Regarding this situation, I hope my essay would, within the country, motivate people doing more fruitful research and discussion on the subject