  We propose a novel self consistent minimal coupling principle in presence of
torsion dilaton field. This principle yields a new local dilatation symmetry
and predicts the interactions of torsion dilaton with the real matter and with
metric. The soft violation of this symmetry yields a physical dilaton and a
simple relation between Cartan scalar curvature and cosmological constant in
this new model of gravity with propagating torsion. Its relation with
scalar-tensor theories of gravity and a possible use of torsion dilaton in the
inflation scenario is discussed.
  \noindent{PACS number(s): 04.50.+h, 04.40.Nr, 04.62.+v}
