A palmar thumb and thumb saddle joint splint comprises a first splint part for receiving the thumb and means for fastening the first splint part to the hand. The first splint part formed as a shell part that is open at the top and is intrinsically stiff but deformable, in which shell part the thumb is laid； the first splint plant being connected firmly to a side-of-the-hand part that is intrinsically stiff but deformable and, when the splint is put in place, embraces the side of the splinted hand； and the fastening means comprising first and second fixing strips which are intrinsically stiff but deformable, wherein the first fixing strip runs from the side-of-the-hand part over the back of the hand to the first splint part, and the second fixing strip, starting from the side of the hand part, is led through between thumb and index finger to the first splint part.
