  We compile one of the largest ever samples to probe the X-ray normal galaxy
luminosity function and its evolution with cosmic time. In particular, we
select 207 galaxies (106 late and 101 early-type systems) from the Chandra Deep
Field North and South surveys, the Extended Chandra Deep Field South and the
XBOOTES survey. We derive the luminosity function separately for the total
(early+late), the early and the late-type samples using both a parametric
maximum likelihood method, and a variant of the non-parametric 1/V_m method.
Although the statistics is limited, we find that the total (early+late) galaxy
sample is consistent with a Pure Luminosity evolution model where the
luminosity evolves according to L(z) ~ (1+z)^2.2. The late-type systems appear
to drive this trend while the early-type systems show much weaker evidence for
evolution. We argue that the X-ray evolution of late-type systems is consistent
with that of blue galaxies in the optical. In contrast there is a mismatch
between the X-ray evolution of early-type systems and that of red galaxies at
optical wavelengths.
