The folding cage is formed by a square-bottomed (1) full of solid material with raised edges to trap any impurities and to settle the side parts (2) each other freely pivotally connected by brackets, which form walls of the cube, where the main back panel (3) is at the top edge (4) pivotally fixed by clamps secured the upper part (5), while the main back panel (3) is greater in width than the other side parts (2) and the bent edges (6) towards the adjacent side panel (2) to enable the composition of the side panels (2), to the central rear section (3) without damage to the terminals connecting the side panels (2) each other, then to the main rear section (3) without damage to the terminals can be shut and the upper part (5).The folding cage is formed by a square-bottomed (1) full of solid material with raised edges to trap any impurities and to settle the side parts (2) each other freely pivotally connected by brackets, which form walls of the cube, where the main back panel (3) is at the top edge (4) pivotally fixed by clamps secured the upper part (5), while the main back panel (3) is greater in width than the other side parts (2) and the bent edges (6) towards the adjacent side panel (2) to enable the composition of the side panels (2), to the central rear section (3) without damage to the terminals connecting the side panels (2) each other, then to the main rear section (3) without damage to the terminals can be shut and the upper part (5).