  We study the pentaquark $uudd\bar s$ with $J=3/2$ and I=1 ($\Theta^{++}$) in
the QCD sum rule approach. We derive the QCD sum rules for positive and
negative parity states of the pentaquark. The QCD sum rule predicts that there
exists $\Theta^{++}$ with negative parity and its mass is $1.5\sim1.6$ GeV. The
negative parity $\Theta^{++}$ can be extremely narrow, since it lies much below
the $\Delta K$ threshold and the decay into $KN$ state is strongly suppressed
due to the $D$-wave centrifugal barrier. Also, the possibility of the existence
of the $\Theta^{++}$ with positive parity is not excluded. Although it nearly
degenerates with the negative parity state, it may be broader than the negative
parity state.
