  We present a calculation of open charm quark production in diffractive deep
inelastic electron-proton scattering in a perturbative QCD framework. The cross
section is proportional to the square of the gluon density and explicitly
displays breaking of Regge factorization. Jet cross sections as well as the
charm contribution to the diffractive structure function are calculated. As a
consequence of the steep rise of the gluon density at small x the charm
contribution to $F_2^{D}$ rises with decreasing x_P.
