An implantable device for reducing the volume of a lung compartment is disclosed. Aspects of the device includes a first contact element configured to contact with an inner wall of a first airway a second contact element configured to contact with an inner wall of a second airway and a compression element configured to apply a compressive force between the first and the second contact elements and to move the first contact element and the second contact element towards each other such that a space between the first airway and the second airway is compressed.