PURPOSE: A double-sided docking device is provided to remarkably reduce the construction length of a breakwater by reducing the total length of the docking device. CONSTITUTION: A double-sided docking device comprises a connection unit and a docking unit(200). The connection unit is connected to a power plant and is protruded from the power plant to the sea. The docking unit is connected to the connection unit and has first and second docking planes(211,212). The first and second docking planes are formed one and the other one sides of the docking unit.
