Abstract: A telescopable vacuum cleaner suction pipe has an outer pipe, an inner pipe having arresting depressions, and arresting element coupled with the outer pipe and engaging in the arresting depressions, a manually actuatable slider unblocking the arresting element, a pressure-loaded blocking spring which when the slider is not actuated holds the arresting element in a locking position and when the slider is actuated the arresting element is movable against the blocking spring to unlocking position for a relative displacement of the inner pipe and the outer pipe, the arresting element being formed as two clamping bodies engaging in separate arresting depressions and inclined at acute angles relative to a longitudinal axis of the out pipe, a guiding body form-lockingly received in the outer pipe and having inclined sliding planes on which the clamping body are displaced, one of the blocking bodies which blocks a relative movement of the inner pipe and the outer pipe is displaceable for releasing its blocking positi