Abstract: The stereotactic system for surgical procedures includes a frame (3a) or ring (3b) securable to a head of a patient with a plurality of fixing screws (3s); a vertical bar bracket (3c) releasably attachable to the frame (3a) or ring (3b) to set a predetermined X or Y position; a vertical graduated bar (3d) movably engaged with, but securable to, the vertical bar bracket (3c), to set a predetermined Z position; a graduated tube (3e) fixed to and extending perpendicularly from the graduate bar (3d); a circular arc-shaped member (3f) provided with an angular positioning scale (AS) graduated in degrees, releasably securable to and pivotally mounted on the graduated tube (3e) and a surgical holding and guiding device securable at a predetermined angular position on the circular arc-shaped member (3f).