The present invention relates to an absorbing element (3) of a safety traffic barrier (1) having a form of a metal, bended thin-walled shape having a first mounting wall (31) provided with connecting means (311, 312) apt to be mounted to a guardrail (4) of a barrier (1), a second mounting wall (34a, 34b) being substantially parallel with respect to the first mounting wall (31) and having connecting means (341) apt to be mounted to a post (2) of a barrier (1), and two deformation walls (32, 33) connecting the first mounting wall (31) with the second mounting wall (34a, 34b). In order to enable for constructing safety traffic barriers of an improved shock-absorption capability each of the deformation walls (32, 33) is inclined at an acute inclination angle in the vertical plane, wherein the orientation of said acute inclination angle (±) is the same for the both deformation walls (32, 33), and furthermore the preferable inclination angle (±) of at least one of the deformation walls (32, 33) is within the range from 4 to 20°, preferably within the range from 5 to 10°, more preferably within the range from 6 to 8°, and particularly preferably amounts about 7°. The absorbing elements (3) of the present invention feature a simple and economical construction and ensure a simple and fast installation of safety traffic barriers (1). The present invention relates also to a safety traffic barrier (1) comprising such absorbing elements (3).