This all-in-one instrument set for single-port thoracoscopy permits minimally invasive diagnostic procedures to be carried out in the thoracic area with one small 5 mm puncture. The semi-flexible operating endoscope with integrated working channel forms the basis of the instrument set. Various instruments can be introduced through its 3.5 mm working channel or the channel can be used for suctioning. Suctioning can be done when the instrument has been inserted. Flexible trocar sheaths, biopsy forceps, hook and coagulation button, electrodes, probes, suction tubes, and power spray complement the set.