  We study the post-Newtonian limit of a generalized dilaton gravity in which
gravity is coupled to dilaton and eletromagnetic fields. The field equations
are derived using the post-Newtonian scheme, and the approximate solution is
presented for a point mass with electric and dilaton charges. The result
indicates that the dilaton effect can be detected, in post-Newtonian level,
using a charged test particle but not a neutral one. We have also checked that
the approximate solution is indeed consistent with the weak field expansion of
charged dilaton black hole solution in the harmonic coordinate.
