A telescopic lifter, mainly for height adjustment of a hospital bed, equipped with a drive (4) and comprising a fixed part (3) in which a first extensible part (1) is concentrically arranged. In the first extensible part (1) at least one second extensible part (2) is concentrically arranged. Inside the first extensible part (1) in the area of its upper end (6) a guide (7) is installed. Inside the second extensible part (2) in the area of its lower end (8) a holder (9) is installed. An electric cable (5) is introduced into the fixed part (3) and the electric cable (5) is attached to the fixed part (3) and freely passes into the inner space of the first extensible part (1). The electric cable (5) is directed through the first extensible part (1) upwards to the guide (7) and over the guide (7) the electric cable (5) is directed downwards to the holder (9) to which the electric cable (5) is firmly fixed and along the inner wall of the second extensible part (2) the electric cable (5) is directed out of the second extensible part (2).