PROBLEM TO BE SOLVED: To provide an assembly for efficiently cultivating short-necked clams, with a short-necked clam-containing apparatus set on a dry beach.SOLUTION: The assembly for efficiently cultivating bivalves is so designed that: short-necked clam containers 5 each having a water passage via which seawater goes thereinto are formed and projectedly set at intervals on a dry beach； there is provided a cylindrical form 1 projectedly supporting the short-necked clam containers 5, each of the containers 5 is formed at a compartment of the cylindrical part of the cylindrical form 1, whose cylindrical continuous space is provided with partitions, a meshy net 3 is laid at each of the partitions, with the meshes impassable for short-necked clams； and short-necked clams are contained in spaces enclosed by the cylindrical form 1 and the partitions.
