Abstract. The author analyzes the idea of existence in Hegelian Science of Logic, which determining proposition is the principle of thinking and existence speculative identity in the system of developing idea forms. Existence as the ingenuousness of idea is not limited by Hegel to abstract indefinite existence, which represents the origin of logic and changes into non-existence. Understood in essential manner, existence has fundamental meanings of being, validity and objectivity.
Key words and phrases: понятие о бытии, принцип тождества мышления и бытия, единство сущности и бытия, существование, действительность, объективность, idea of existence, principle of thinking and existence identity, essence and existence unity, being, validity, objectivity