The invention relates to the technical field of sun visors, and discloses a sun visor for cars including a back plane and a sun visor lens. An inner portion of the back plane is fixedly connected with iron sheets, a left portion of an upper end of the back plane is fixedly connected with a left buckle, and a right portion of the upper end of the back plane is fixedly connected with a right buckle. For the sun visor for cars according to the invention, the sun visor for cars is easy to install, and the position of the sun visor can also be adjusted flexibly to meet the sunshade needs at different times and is suitable for wide use.