A telescopic tube has a tube assembly and a connecting assembly. The tube assembly has a first rod, a second rod, a third rod, and a fourth rod. The second rod, the third rod, and the fourth rod are mounted respectively around outer surfaces of the first rod, of the second rod, and of the third rod respectively. The connecting assembly has a first connecting unit, a second connecting unit, and a third connecting unit. The first connecting unit links together the first rod and the second rod. The second connecting unit links together the second rod and the third rod. The third connecting unit links together the third rod and the fourth rod. The telescopic tube is applied on a walking stick or a clothes pole which ensures that the walking stick or the clothes pole has a small size when retracted and ease of use when extended.
