  We present iron abundance measurements, based on high resolution
spectroscopy, and accurate distance determinations, based on near infrared
photometry, for 34 Galactic Cepheids. The new data are used to constrain the
Galactic iron abundance gradient in the outer disk, namely from 10 to 14 kpc.
We confirm the flattening of the gradient toward the outer disk. In this region
we also found an increase in the metallicity dispersion. Current data do not
support the occurrence of a jump in the metallicity gradient for Galactocentric
distances of the order of 10-12 kpc.
