To provide a molding method in which a required part of a surface of a molded article is mirror-finished when the article is released from a die by using magnesium or magnesium alloy as a material.

Magnesium or magnesium alloy is melted into a fluid condition and filled in a cavity in the die 2, and the temperature of magnesium or magnesium alloy in contact with the required part of the wall surface forming the cavity is set in a range from the temperature lower than the melting point of magnesium or magnesium alloy by 30°C to the temperature higher than the melting point by 20°C by using a heater 3 built in the die 2.