The formulation in 1927 of the so called uncertainty principle by Werner Heisenberg was originated to resolve a problem with wich it apparently did not bear any relation: the possible intuitive content of the quantum theory, whose mathematic formalism had already been constituted at the end of 1925. The work’s objective consists in the detailed showing of the ideas which lead to it’s obtainment, apart from all discussion relative to the determinist or indeterminist behavior of atomic systems.