The necessity and ways of studying the logic of real human thinking are highlighted, its significant difference from formal logic, both modern, symbolic and old, traditional; its connection and coincidence with dialectics (as logic) in Aristotelian, Hegelian, and Marxist understanding of it. It is shown that the logic of real human thinking covers not only the conscious side of thinking expressed in the sentence of verbal language, but also the unconscious, which is implicitly implied in thoughts.