A method for producing 2-methyl-3-(3,4-methylenedioxyphenyl)-propanal for a perfume comprising: step: carrying out a process for reacting 1,2-methylenedioxybenzene represented by the following formula with 2-methyl-3,3-diacetoxypropene represented by the following formula, or for reacting 1,2- methylenedioxybenzene, methacrolein and acetic anhydride, thereby providing a reaction mixture containing 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene represented by the following formula, and removing unreacted 1,2-methylenedioxybenzene from the reaction mixture by distillation or crystallization, wherein the distillation is carried out at a temperature of from 40 to 175°C, and a pressure of from 0.133 to 101.3 kPa (1 to 760 torr); step: providing a reaction mixture containing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal represented by the following formula by hydrolysis reaction or ester exchange reaction with an alcohol of subjecting 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene represented by the formula obtained in the step in the presence of a catalyst, and neutralizing as a post-treatment the catalyst with an acid or a base, or washing the reaction mixture with water, an acidic aqueous solution or a basic aqueous solution for removing the catalyst; step, removing a compound having a boiling point higher than 2-methyl-3-(3,4-methylenedioxyphenyl)propanal from the reaction mixture by distillation, thereby providing a crude product containing 2-methyl-3-(3,4-methylenedioxyphenyl) propanal; wherein the pressure at the head part of the rectification column is from 0.013 to 13.33 kPa (0.1 to 100 torr), the distillation temperature is from120 to 230 °C, the substantial number of plates in the distillation purification is from 1 to 200 plates for each of rectification columns and the reflux ratio (refluxed amount/distilled amount) in the distillation purification is from 0 to 50; and step: purifying by distillation of the reaction mixture obtained in the step, at a liquid temperature in the distillation vessel of 210°C or less, the temperature in the range of from 100 to 210 °C at the head part of the rectification column, under reduced pressure of from 0.013 to 13.33 kPa (0.1 to 100 torr). step: carrying out a process for reacting 1,2-methylenedioxybenzene represented by the following formula with 2-methyl-3,3-diacetoxypropene represented by the following formula, or for reacting 1,2- methylenedioxybenzene, methacrolein and acetic anhydride, thereby providing a reaction mixture containing 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene represented by the following formula, and removing unreacted 1,2-methylenedioxybenzene from the reaction mixture by distillation or crystallization, wherein the distillation is carried out at a temperature of from 40 to 175°C, and a pressure of from 0.133 to 101.3 kPa (1 to 760 torr); for reacting 1,2-methylenedioxybenzene represented by the following formula with 2-methyl-3,3-diacetoxypropene represented by the following formula, or for reacting 1,2- methylenedioxybenzene, methacrolein and acetic anhydride, thereby providing a reaction mixture containing 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene represented by the following formula, and removing unreacted 1,2-methylenedioxybenzene from the reaction mixture by distillation or crystallization, wherein the distillation is carried out at a temperature of from 40 to 175°C, and a pressure of from 0.133 to 101.3 kPa (1 to 760 torr); step: providing a reaction mixture containing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal represented by the following formula by hydrolysis reaction or ester exchange reaction with an alcohol of subjecting 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene represented by the formula obtained in the step in the presence of a catalyst, and neutralizing as a post-treatment the catalyst with an acid or a base, or washing the reaction mixture with water, an acidic aqueous solution or a basic aqueous solution for removing the catalyst; step, removing a compound having a boiling point higher than 2-methyl-3-(3,4-methylenedioxyphenyl)propanal from the reaction mixture by distillation, thereby providing a crude product containing 2-methyl-3-(3,4-methylenedioxyphenyl) propanal; wherein the pressure at the head part of the rectification column is from 0.013 to 13.33 kPa (0.1 to 100 torr), the distillation temperature is from120 to 230 °C, the substantial number of plates in the distillation purification is from 1 to 200 plates for each of rectification columns and the reflux ratio (refluxed amount/distilled amount) in the distillation purification is from 0 to 50; and step: purifying by distillation of the reaction mixture obtained in the step, at a liquid temperature in the distillation vessel of 210°C or less, the temperature in the range of from 100 to 210 °C at the head part of the rectification column, under reduced pressure of from 0.013 to 13.33 kPa (0.1 to 100 torr).