A hiking stick 10 wherein support pipes 11, 12 and 13 each having different diameters are engaged to each other, and the length thereof is elastically adjusted by means of an adjusting means 30, and a handle 20 and a prop 40 are engaged to the tops and bottoms of the support pipes 11, 12 and 13, comprising: the adjusting means 30 which includes a fixing pipe 31 engaged to bottom of the first support pipe 11, and an operation pipe 32 engaged to the fixing pipe 31 and is elastically supported by means of a spring 33, wherein a second support pipe 12 on an outer circumferential surface of which a plurality of engaging grooves 12a are formed at regular intervals, is inserted in the interior of the first support pipe 11 and ascends and descends therein, and an engaging hole 31b passing through its side surface is formed at bottom of the fixing pipe 31, and a stopper ball 31a is inserted in the engaging hole 31b, and when the ball 31a is pressed against the inner diameter of the operation pipe 32, the ball 31a is caught by the engaging groove 12a of the second support pipe 12, and the second support pipe 12 is fixed in the interior of the first support pipe 11, and the operation pipe 32 ascends, and when the ball 31a is positioned in a wider expansion groove 32a at bottom of the operation pipe 32, the ball 31a disengages from the engaging groove 12a of the second support pipe 12, and the second support pipe 12 freely ascends or descends in the interior of the first support pipe 11, and a snap ring 34 is engaged to bottom of the fixing pipe 31 so as to prevent the operation pipe 32 from disengaging, wherein a snap ring 34 is engaged to a bottom of the fixing pipe 31, thus preventing the operation pipe 32 separating and moving toward a bottom of the fixing pipe 31, and a shoulder 31c is formed at top of the fixing pipe 31, so the operation pipe 32 may move between the shoulder 31c and the snap ring 34 in a state that the operation pipe 32 is elastically supported by the spring 33. the adjusting means 30 which includes a fixing pipe 31 engaged to bottom of the first support pipe 11, and an operation pipe 32 engaged to the fixing pipe 31 and is elastically supported by means of a spring 33, wherein a second support pipe 12 on an outer circumferential surface of which a plurality of engaging grooves 12a are formed at regular intervals, is inserted in the interior of the first support pipe 11 and ascends and descends therein, and an engaging hole 31b passing through its side surface is formed at bottom of the fixing pipe 31, and a stopper ball 31a is inserted in the engaging hole 31b, and when the ball 31a is pressed against the inner diameter of the operation pipe 32, the ball 31a is caught by the engaging groove 12a of the second support pipe 12, and the second support pipe 12 is fixed in the interior of the first support pipe 11, and the operation pipe 32 ascends, and when the ball 31a is positioned in a wider expansion groove 32a at bottom of the operation pipe 32, the ball 31a disengages from the engaging groove 12a of the second support pipe 12, and the second support pipe 12 freely ascends or descends in the interior of the first support pipe 11, and a snap ring 34 is engaged to bottom of the fixing pipe 31 so as to prevent the operation pipe 32 from disengaging, wherein a snap ring 34 is engaged to a bottom of the fixing pipe 31, thus preventing the operation pipe 32 separating and moving toward a bottom of the fixing pipe 31, and a shoulder 31c is formed at top of the fixing pipe 31, so the operation pipe 32 may move between the shoulder 31c and the snap ring 34 in a state that the operation pipe 32 is elastically supported by the spring 33.