The author postulates a class of psychological phenomena in which their inner (inter-corporeal) and outer (extra-corporeal) sides, their separation and unification, form a whole. The class is a subject matter of the so-called conception of the meta-individual world. How does the contradictory wholeness emerge in this class of phenomena and what are its inner mechanisms? This is the main issue the conception has to deal with. The meta-individual world is a heterogeneous poli-system with many qualities and determining factors. Its existence and functioning is regulated by the principles of relativity and complementarity, of parallelism and transitions between the systems. In the meta-individual world, four relatively independent areas are distinguished: «authorship», «possession», «acceptance» and «dependence».