Abstract : We consider the regularity criterion for the 3D MHD equations. It is proved that if the horizontal components of the velocity and magnetic fields satisfyu ~, b ~ ∈ L 2 / ( 1 - r ) ( 0, T ; M ˙ 2, 3 / r ) with0 < r < 1, then the solution smooth. This improves the result given by Gala (2012).