A concealed tear-resistant hanging-bracket group with precise depth adjustment for assembling a wall cupboard to a wall includes a plate and a hooking element. The plate has a plurality of fixing pins for engagement to a shoulder of the wall cupboard, and the hooking element couples the hanging-bracket group to a supporting element fixed to the wall. The hanging-bracket group is adjustable in depth and height by action of horizontal and vertical movement members. The horizontal movement member includes a threaded hole formed in a protrusion in the plate and a grub screw received in the threaded hole, a rotation of the grub screw causing a depth adjustment A guiding member for a screwdriver is coupled to the plate and includes a guiding element positioned in a pass-through opening of the plate, below and adjacent to the protrusion.