Abstract: A stringed musical instrument comprises a body (1) over which are stretched substantially parallel strings (4). Each string is stretched between a tuning key (3) and a bridge-tailpiece assembly (7). This assembly comprises a plate (8) attached to the body (1) and a respective adjustment member for each string mounted on the plate (8). Each adjustment member comprises a peg (15) movable in translation relative to the plate (8) parallel to the corresponding string and a bridge member (18) pivoted to the peg. The bridge member (18) may be oriented relative to the plate (8) of the bridge-tailpiece assembly (7) by a positioning device (22). The bridge-tailpiece assembly (7) comprises a bore (20) through which the corresponding string (4) passes, this string being hooked on to the body (1) at a point such that it bears on the bridge member (18) over substantially the entire length of the bore (20) and that the positioning device is pushed on the body by the string tension.