<p>The present invention relates to a mooring apparatus for a floating marine structure. The mooring apparatus comprises: a mooring body which is connected to the portside and starboard of a bow and the portside and starboard of a stern by a mooring chain and floats to the surface of water; a main chain connected to the bottom surface of the mooring body; a union piece connected to the lower end of the main chain; multiple connection chains connected to the union piece to face the seabed; and multiple weights placed on the seabed by being connected to the end of the connection chains. The mooring apparatus is provided to moor an FLNG to test gas along the coast, where the construction of the FLNG continues, by being semi-permanently installed at a low cost.</p>
