Conviction that the world is homogeneous and examinable with one prospect is deceptive. World is a multiplicity of reality – says Leon Chwistek. The article shows the theory of the multiplicity of reality by Leon Chwistek, where the philosopher distin- guishes four fundamental types of reality: sensations, conceptions, things and physical matter. The author analyses one of them in detail – reality of sensations. Chwistek deﬁnes reality of sensations through the formal record based on the group of axioms. The logical record of the reality of sensations system allows only to look formally into this type. The author refers to the sources of philosophical reality of sensations which was a source of inspiration for its creation. She alludes to the John Locke, David Hume, Richard Avena- rius and Ernst Mach’s conceptions. The author describes reality of sensations through categories of the impression and sensory experience. She states that cognition of reality of sensations is closely associated with an individual way of observing the world by every human.