Meth) acrylic acid

(57) Abstract: The present invention, (meth) from a mixture containing a solution having a higher boiling point than the boiling point of acrylic acid and (meth) acrylic acid, is connected to the evaporator, and recovering the mixture between is supplied by distillation of the mixture in a column in which parts and rectifying section is provided a method for producing a (meth) acrylic acid. Also, the tower has a side outlet for (methyl) acrylate. According to the method of the present invention, a polymerization inhibitor is introduced into the outlet of the top and side. The amount of the polymerization inhibitor to be introduced into the top of the column is a small amount than the amount of said inhibitor which is introduced into the outlet of the side.