Lateral-torsional buckling is one of key factors that determine ductile behavior of steel moment frames. Current lateral bracing requirements for beams are established on the basis of monotonic loading conditions in Japanese seismic provisions. However, the relationship between the current provisions and lateral bracing stiffness requirements under cyclic loading conditions has not been confirmed systematically yet. In this study, an experimental study was conducted to assess the effect of lateral bracing stiffness on the H-section beam strength under cyclic loading. Three different lateral bracing types were examined under cyclic antisymmetrical moment. A numerical analysis is used to simulate the experimental results and compute the effects of lateral bracing stiffness, bracing span, stiffener and dead load condition on the H-section beam elasto-plastic lateral-torsional buckling behavior. The results are compared to the requirements of the current provisions and discussed.