In this paper results of empirical researches (this results were received in experiment and professional supervision â€śDiagnostics of the altered states of consciousnessâ€ť) in which analytic introspection was used as method to induce the states of consciousness, transitive to altered are considered. Opportunities of the Leontievâ€™s theory of the structure of consciousness to explane a phenomenology of the altered states of consciousness are examined. We offer explanations of such phenomena as a loss of tridimentionality and constancy of perception (the sizes, forms, position in space, colors and brightness), mistakes in recognition of objects and itsâ€™ properties (in particular, pareydolia), a derealization, a detailed elaboration has been explaned. Results of experiments with analytic introspection allow elaborating of A.N. Leontievâ€™s ideas about functions of a sensual fabric of an image.