Abstract: An endoscope, in particular a mediastinoscope, in which the handle and the optics guided therein form an inseparable unit and which includes a first and second spatula-like part which can be separated from one another in the longitudinal direction. An adjusting mechanism is provided which permits a separation, a fastenable displacement parallel to the axis and a fastenable pivoting of the two parts relative to one another. In particular by way of the pivotability an expansion of a body cavity to be visually examined or which is to undergo therapy by way of introduced auxiliary instruments is made possible according to requirements.