A retractable telescopic gangway for a floating navigation unit, defining an upper gangway walkway plane, and adapted to allow the transit of an individual entering, or exiting, said floating navigation unit, transiting on said upper gangway walkway plane, wherein said retractable telescopic gangway comprises: - at least two gangway elements (10, 20) telescopically engaged and slidable with respect to one another along a gangway axis (P-P) parallel to said walkway surface between a minimum gangway length and a maximum gangway length; said at least two gangway elements (10, 20), telescopically engaged with one another, comprising a proximal end element adapted to be fastened to said floating navigation unit, and one opposite distal end element; - telescopic actuation means for moving said at least two gangway elements (10, 20) with respect to one another along the gangway axis between said minimum gangway length and said maximum gangway length; - a terminal element having an elongated shape defining a terminal element axis (T-T) along a main development direction thereof, said terminal element being rotatably engaged with said distal end element about a hinge axis (C-C) parallel to the gangway walkway plane and orthogonal to the gangway axis (P-P) and to the terminal element axis (T-T), in a manner adjustable between a rest angular position, in which the terminal element is superimposed on the distal end element, and an operative position, in which the terminal element is angularly spaced with respect to the distal end element, between a maximum upward inclination position and a maximum downward inclination position; - rotary actuation means for rotating said terminal element with respect to said distal end element; characterized in that the distal end element comprises a housing compartment comprising at least one open side, said housing compartment being configured to completely receive and house thereinside said terminal element in the rest angular position through said at least one open side. - at least two gangway elements (10, 20) telescopically engaged and slidable with respect to one another along a gangway axis (P-P) parallel to said walkway surface between a minimum gangway length and a maximum gangway length; said at least two gangway elements (10, 20), telescopically engaged with one another, comprising a proximal end element adapted to be fastened to said floating navigation unit, and one opposite distal end element; - telescopic actuation means for moving said at least two gangway elements (10, 20) with respect to one another along the gangway axis between said minimum gangway length and said maximum gangway length; - a terminal element having an elongated shape defining a terminal element axis (T-T) along a main development direction thereof, said terminal element being rotatably engaged with said distal end element about a hinge axis (C-C) parallel to the gangway walkway plane and orthogonal to the gangway axis (P-P) and to the terminal element axis (T-T), in a manner adjustable between a rest angular position, in which the terminal element is superimposed on the distal end element, and an operative position, in which the terminal element is angularly spaced with respect to the distal end element, between a maximum upward inclination position and a maximum downward inclination position; - rotary actuation means for rotating said terminal element with respect to said distal end element; characterized in that the distal end element comprises a housing compartment comprising at least one open side, said housing compartment being configured to completely receive and house thereinside said terminal element in the rest angular position through said at least one open side.