An adjustable orthopaedic corset (10) to support a user's spinal column is described herein, comprising an extended and curvilinear rigid frame (14) having, at points placed in specularly symmetrical areas, a pair of upper connecting slots (16, 18), a pair of intermediate connecting slots (20, 22) and a pair of lower connecting slots (24, 26) to which a pair of front straps (28, 30), that are wrapped around the user's shoulders, and a pair of rear straps (32, 34), that are wrapped around the user's sides, are directly or indirectly operationally connected. A further pair of connecting slots (36, 38) for a respective pair of pelvic straps (40, 42), which join up at the front of the user's abdomen by means of respective superimposable abdominal plates (44, 46) are also envisaged at the lower end of the rigid frame (14).