The paper aims to analyze the influence of Baruch Spinoza’s philosophy on Albert Einstein’s work, in particular his physics. Einstein was a man of genius personality of contemporary physics, but we can see him as a prominent philosopher, too. He studied the philosophical works of Kant, Leibniz, Hume and other modern philosophers. But his most preferred thinker was Baruch Spinoza. Einstein knew very well Spinoza’s main book, Ethics. He accepted Spinoza’s concepts of human being and the dignity of man in the history of the world. The concept of God proposed by the author of Ethics was very important for Einstein. Spinoza’s inspiring philosophy is present in Einstein’s vision of the universe and in his deterministic view on quantum mechanics. This problem is reflected in the paper too.