A hidden hanging bracket with an anti-disengagement system for wall cupboards, wherein a wall cupboard is hooked to a support fixed to the wall by a hooking tooth, includes, in combination: a base on which a slide runs, carrying a regulation mechanism in depth (horizontal) with a lead screw with which the hooking tooth is integral, a height regulation mechanism (vertical) with a lead screw, and a bead suitable for interfering with the support. The bead is screwed onto the slide in a position below and substantially opposing (not completely offset) with respect to the tooth, and the tip or end part of the bead is engaged with a flap (horizontal edge) folded directly from the support fixed to the wall.