Abstract: This invention concerns a trestle support for musical keyboards of the type equippd with legs crossed in the form of an `X`, equipped with a new device that permits rapid and easy adjustment of the angle of spread of the aforesaid legs and the height of the keyboard above the ground by means of a special new and original joint that allows for easy and quick mounting and detachment of transversal tubular bars positioned at either end of the legs of the trestle, those positioned at the base resting on the ground and acting as stabilizing feet for the trestle, while the ones positioned at the upper ends act as supporting arms for the keyboard.