Provided is a floating assembly. The floating assembly of the present invention comprises a plurality of containers having buoyancy by the air which fills the internal spaces of the containers by means of injection ports formed in one end of each container, an injection port lid which has a check valve for supplying air in one direction into the inside of the container, wherein the check valve arranged at the bottom surface of a lid member is coupled to the injection port, and which seals the injection port, and a container fixing unit having a plurality of fixing holes for the insertion and fixation of the containers, wherein the container fixing unit fixes the plurality of containers arranged in the vicinity of each other.
