Producing method for magnesium alloy material

A method for producing a magnesium alloy material, the method comprising:

• a melting step of melting a magnesium alloy in a melting furnace to obtain a molten metal;
• a transfer step of transferring the molten metal from the melting furnace to a molten metal reservoir;
• and
• a casting step of supplying a movable mold with the molten metal from the molten metal reservoir through a pouring gate and solidifying the molten metal to continuously produce a cast material of a thickness of from 0.1 to 10 mm,
• wherein in a process from the melting step to the casting step, all parts contacted by the molten metal are formed by a low-oxygen material having an oxygen content of 20 mass % or less, the low-oxygen material is one or more selected from a carbon-based material, molybdenum, silicon carbide, boron nitride, copper, a copper alloy, iron, steel and stainless steel, and wherein
• the part contacted by the molten metal includes a surface part in the melting furnace a surface part of a transfer gutter between the melting furnace and the molten metal reservoir, a surface part of the molten metal reservoir, a surface part of a supply part between the molten metal reservoir and a movable mold, and a surface part of the movable mold.