Abstract: A kicking strap for sailing-boats comprises a tackle with two multifold blocks (8, 9) connected and supported by means of two telescopic pipes (15, 16). The pipes are connected by a spring counteracting their joining, e.g. a pneumatic spring (21) secured both to one block (8) and the inner pipe (15), its piston being rigidly connected to the outer pipe (16) through a pin (31) extending through the head of the piston (22). The outer pipe is welded to the second block (9). The pin (31) is guided in an extension of the inner pipe (15). At for instance booming, the kicking strap located between the mast-foot and the boom exerts by means of the spring an upward pressure on the boom so that the boom in the central position during the booming is still raised and may thereby safely pass above the crew.