Design method of an orthopedic support suitable for being applied on a part (A) of the body of a patient; said method comprising the following steps: - step of determination of the part (A) of the body where said orthopedic support is to be applied; - step of identification of a generic 3D model (H1) in a 3D model database relative to the part (A) of the patient's body where the orthopedic support is to be applied; - step of acquisition of a 3D image (K) of the part (A) of the patient's body where said orthopedic support is to be applied, by means of 3D image acquisition means; - step of detection of biometric data (B) of the part (A) of the patient's body where said orthopedic support is to be applied; - step of modeling of the generic 3D model (H1); said modeling of the generic 3D model (H1) providing for a step of merging wherein the generic 3D model (H1) is merged with the 3D image (K) in such a way to obtain a 3D model that is modelized according to the morphology of the part (A) of the patient's body; said modeling also providing for a as step of dimensioning wherein the modelized 3D model is redimensioned according to the biometric data (B) detected in the step of detection , in such a way to obtain a 3D digital prototype (P) of the orthopedic support wherein each generic 3D model (H1) stored in the 3D model database comprises a plurality of base units that are joined one to another; wherein, in said step of dimensioning of said step of modeling , each base unit of the generic 3D model (H1) is redimensioned according to the biometric data (B) detected in the step of detection ; and characterised in that said base units of the generic 3D model (H1) are disposed in such a way to define separation lines between adjacent base units that coincide with stress lines and breakage lines of the generic 3D model (H1). - step of determination of the part (A) of the body where said orthopedic support is to be applied; - step of identification of a generic 3D model (H1) in a 3D model database relative to the part (A) of the patient's body where the orthopedic support is to be applied; - step of acquisition of a 3D image (K) of the part (A) of the patient's body where said orthopedic support is to be applied, by means of 3D image acquisition means; - step of detection of biometric data (B) of the part (A) of the patient's body where said orthopedic support is to be applied; - step of modeling of the generic 3D model (H1); said modeling of the generic 3D model (H1) providing for a step of merging wherein the generic 3D model (H1) is merged with the 3D image (K) in such a way to obtain a 3D model that is modelized according to the morphology of the part (A) of the patient's body; said modeling also providing for a as step of dimensioning wherein the modelized 3D model is redimensioned according to the biometric data (B) detected in the step of detection , in such a way to obtain a 3D digital prototype (P) of the orthopedic support wherein each generic 3D model (H1) stored in the 3D model database comprises a plurality of base units that are joined one to another; wherein, in said step of dimensioning of said step of modeling , each base unit of the generic 3D model (H1) is redimensioned according to the biometric data (B) detected in the step of detection ; and characterised in that said base units of the generic 3D model (H1) are disposed in such a way to define separation lines between adjacent base units that coincide with stress lines and breakage lines of the generic 3D model (H1). <EOS>