  High quality spectrophotometric observations of 30 Planetary Nebulae in the
Galactic Bulge have been made. Accurate reddenings, plasma parameters, and
abundances of He,O,N,S,Ar,Cl are derived.
  We find the abundances of O,S,Ar in the Planetary Nebulae in the Galactic
Bulge to be comparable with the abundances of the Planetary Nebulae in the
Disk, high abundances being maybe slightly more frequent in the Bulge.
  The distribution of the N/O ratio does not present in the Galactic Bulge
Planetary Nebulae the extension to high values that it presents in the Disk
Planetary Nebulae. We interpret this as a signature of the greater age of Bulge
Planetary Nebulae.
  We thus find the Bulge Planetary Nebulae to be an old population, slightly
more metal-rich than the Disk Planetary Nebulae. The population of the Bulge
Planetary Nebulae shows hence the same characteristics than the Bulge stellar
population.
