Abstract: A device is provided for absorbing shock during use of crutches wherein are provided two telescopic tubes (6, 7) which, on the one hand, make possible adjusting the effective height of the crutch and, on the other hand, absorb the impact of the crutch to the ground. The device includes of a plug member (13) which is fitted to the upper extremity of the lower telescopic tube (6) and which has an elongate side hole (15) wherein a pin (11′) can slide and is secured to the upper external tube (7), precisely through an orifice (12) drilled in the tube. The length of the elongate orifice (15) of the plug member limits the relative motion between the two tubes (6, 7) forming the strut (1). The elements are maintained at a maximum distance from each other by a spring (10) positioned between the plug member (13) and the second pin (11) of the upper external tube.