Refrigerator and manufacturing method thereof

A refrigerator comprising:

• a main body including a first insulating panel having a first coupler and a second insulating panel having a second coupler, wherein the first coupler and the second coupler are coupled together;
• a storage compartment inside the main body;
• a door to open and close the storage compartment;
• and
• a cooling device to cool the storage compartment,
• wherein the first insulating panel, the first coupler, the second insulating panel, and the second coupler are configured so that, to couple the first coupler and the second coupler together, the first insulating panel and first coupler are movable in a first direction toward the second insulating panel and the second coupler so that the first coupler and the second coupler become engaged, and, after the first coupler and the second coupler are engaged, the first insulating panel and the first coupler are movable in a second direction perpendicular to the first direction so that the first coupler and the second coupler become coupled.