  We search for the baryon and lepton number violating charm decays, $D
\rightarrow p\ell$, where $D$ is either a $D^0$ or a $\overline{D}^0$ and
$\ell$ is a muon or an electron, using a data sample of $921\,\mathrm{fb}^{-1}$
collected by the Belle detector at the KEKB asymmetric energy $e^{+}e^{-}$
collider. In the absence of significant signals, we set upper limits on the
branching fractions in the range $(5 - 8) \times 10^{-7}$ at a 90\% confidence
level, depending on the decay mode.
