A cage for the transportation of live poultry, including one single body of moulded plastic material (1) having a generally quadrangular shape, open superiorly and including lateral walls (2, 3) and a bottom wall (4) having a grid-like configuration. At the corners between adjacent lateral walls (2, 3) the cage body (2) is formed with integral tubular enlarged members (5) having a generally rounded design, each of which includes an outer convex wall (6) having a smooth and continuos surface. The grid-like configuration of the cage bottom wall (4) is defined by small circular holes (12).