  We derive the analytical properties of the elastic forward scattering
amplitude of two scalar particles from the axioms of the noncommutative quantum
field theory. For the case of only space-space noncommutativity, i.e.
$\theta_{0i}=0$, we prove the dispersion relation which is similar to the one
in commutative quantum field theory. The proof in this case is based on the
existence of the analog of the usual microcausality condition and uses the
Lehmann-Symanzik-Zimmermann (LSZ) or equivalently the
Bogoliubov-Medvedev-Polivanov (BMP) reduction formalisms. The existence of the
latter formalisms is also shown. We remark on the general noncommutative case,
$\theta_{0i}\neq0$, as well as on the nonforward scattering amplitude and
mention their peculiarities.
