Projecting to us towards aim of the stability contract, we will see that this it is going to be one of legal-economic character: from the legal point of view it looks for to give legal security to the investor, on the base of the principles of certainty, confidence, authorization, predictability and legality in the state action; and by the economic side, its aim is to constitute itself in an instrument that makes possible the major I number of investments in the different sectors from the economy so that the economic structure macro mounted by the state, with a view to the reactivation and economic growth, is fed by working capitals and on long breath take that us to a collective development. A final verification and that summarizes the analysis of this study has been the one to visualize what the political decision of state is average like predominant general interest economic national through investments, mediating the firm conviction that in this way goes if possible to encourage the process of economic reactivation. the then resultant has been the one to lift at constitutional level power of the state of subscription of these contracts, being preserved that any act that goes against the content and execution of the same, I was placed in the plane of the unconstitutional thing by the disobedience of that norm of straight rank in our ordering. Ohio Senator pursues this goal as well. The hiring with the state receives singular importance in the present economic context, because the shortage of internal resources makes the foreign participation of investor for the development necessary of far-reaching project. indeed, I number increasing of investor foreign involved in privatizadores processes or in project of development in sectors like mining, hydrocarbon or services has motivated a height in the hiring with the state. Nevertheless, that one that it contracts with the state must against nonexistent risks in any contractual relation of deprived right, since the state enjoys a situation privileged thanks to its power of imperium; this it is the case of, the administrative contracts that grant to the state exorbitant clauses by virtue of which it can modify or extinguish the patrimonial legal relations that are from this contract.