Roof rack for motor vehicles

Roof rack for motor vehicles is provided, said roof rack comprises a cross member and leg members arranged on both sides of said cross member, each leg member comprising a support unit, which is adapted to rest on a respective carrier bar unit of a body of said motor vehicle, said support unit comprising a retaining unit adapted to be connected to a mounting section of said carrier bar unit, said support unit is adapted to be supported on said respective carrier bar unit and that said support unit comprises a first form locking element designed to cooperate with a second form locking element on said respective carrier bar unit upon movement in a locking direction extending essentially parallel to said cross member in order to provide a form locking fixation of said support unit with respect to said respective carrier bar unit against movement in directions transverse to said cross member.