A process for producing a (meth)acrylic acid compound, which comprises
distilling acrylic acid, methacrylic acid (these will hereinafter
generally be referred to as "(meth)acrylic acid") or an ester thereof
(these will hereinafter generally be referred to as "a (meth)acrylic acid
compound") in a distillation column to obtain a purified (meth)acrylic
acid compound, characterized in that in the course of operation of the
distillation column including suspension and resumption of the operation,
the distillation column is washed with water and, thereafter, inside
washing with an organic solvent and/or azeotropic distillation in the
presence of the organic solvent is conducted. In some cases, washing with
alkaline water may be added prior to the washing with water. Washing of
the distillation column for separating and purifying a crude
(meth)acrylic acid compound, can be carried out easily. In particular, in
a process for producing a (meth)acrylic acid compound, a substance used
in a step before or after the distillation column can be utilized to
recover a valuable substance, and the distillation column can be
efficiently cleaned.