The invention relates to a torsional vibration damper (1) comprising a discoid inertia mass (3) with a radially inner first edge region (4) and a radially outer second edge region (5), a flywheel pendulum device (2) being connected to the inertia mass (3) between the two edge regions. A discoid cover element (21) is provided and is connected to the inertia mass in order to define an enclosed space (24) in which the flywheel pendulum device is accommodated.
