PURPOSE: To prevent a gelled material from producing and continuously purify a methyl (meth)acrylate compound by connecting plural evaporators and blowing molecular oxygen into a bottom holding tank of each evaporator in order to desolvate the methyl (meth)acrylate compound.

CONSTITUTION: Two or more evaporators 1-1 and 2-2 are connected and molecular oxygen is blown into bottom holding tanks 3-3 and 4-4 of the respective evaporators 1-1 and 2-2 in order to desolvate a methyl (meth)acrylate compound of the formula (R1 is H or an alkyl; R2 is an alkyl, an alkenyl, an alicyclic alkyl, an alicyclic alkenyl, an alkyl containing epoxy, a heterocyclic ring or an alkyl containing O, S or N). Thereby, the methyl (meth)acrylate compound is continuously purified. The temperature of transfer lines to the bottom holding tanks 3-3 and 4-4 is preferably cooled to ≤40°C.