We study homogeneous geodesics of sub-Riemannian manifolds, i.e. , normal that are orbits one-parametric subgroups isometries. obtain a criterion for geodesic to be in terms its initial momentum. prove any weakly commutative space is orbit, means all homogeneous. discuss some examples orbit manifolds. In particular, we show Carnot groups only step 1 and 2. Finally, get broad condition existence...