Abstract: A telescopic device (1) has three telescopic segments, viz. an outer segment (2), an intermediate segment (4) and an inner segment (6). The inner segment (6) is arranged to be telescoped in the intermediate segment (4) by a first shifting device (8), the intermediate segment (4) in turn being arranged to be telescoped in the outer segment (2) by a second shifting device (10). The first and the second shifting device (8, 10) are mechanically connected to each other by a transmission connection (46) in such a manner that activation of one of the shifting devices (8; 10) causes simultaneous activation also of the other shifting device (10; 8) and simultaneous telescoping of the intermediate segment (4) in relation to the outer segment (2) and of the inner segment (6) in relation to the intermediate segment (4).