Abstract: A ladder stabiliser 1 comprises a metal frame (2) of substantially A-shape, comprising a pair of ground-engaging legs 3 connected by an upper cross-member (4) and a lower cross-member (5). A retaining bar 6 is mounted at an upper part of the frame (2), and serves to attach the stabiliser 1 to a ladder 10, in use. A pair of hooks 7 are mounted on the lower cross-member (5) and serve to support the lowermost rung 102 of the ladder 10 in use of the stabiliser 1. Each of the legs 3 is of adjustable height and is such that, even in the least extended position of the legs 3, the foot of the ladder 10, represented by the lowermost part of its stiles 101, is maintained clearly above ground level. This ensures that the weight of the ladder 10 is transferred to the ground 20 via the legs 3, rather than the ladder stiles 101, thereby providing a reliably wider support base for the ladder 10.