  $s$-channel discontinuity of quark-quark scattering amplitude with gluon
quantum numbers in the $t$ channel and negative signature is calculated in the
Regge kinematical region in the two-loop approximation. Using this
discontinuity and assuming that the Regge asymptotic behaviour is given by the
Reggeized gluon contribution, we calculate the gluon trajectory in the two-loop
approximation. Remarkable cancellations lead to the independence of the
trajectory on properties of the scattered quarks, confirming the gluon
Reggeization.
