The invention relates to a patient-specific surgical guide (200) comprising: at least one guiding element (202a, 202b) for guiding a surgical instrument to treat a subcutaneous anatomical structure (100, 101) of the patient, and a first patient-specific contact element (201) comprising a first patient-specific contact surface (2010) intended to fit a portion of said subcutaneous anatomical structure (100, 101), said at least one patient-specific contact surface (2010) being rigidly connected to the at least one guiding element (202a, 202b), said patient-specific surgical guide being characterized in that it further comprises at least one second patient-specific contact element (203) distant from the first patient-specific contact element (201), comprising at least one support element (203b) suitable for supporting a percutaneous pin or needle (205) whose tip is intended to contact a point (103) of said subcutaneous anatomical structure or of an anatomical structure rigidly connected to said subcutaneous anatomical structure, an elongated junction member (204) rigidly coupling said at least one guiding element (202a, 202b) to the at least one second contact element (203). The at least one second patient-specific contact element (203) can comprise a second patient-specific contact surface (203a) intended to match a portion of the patients skin. The surgical guide can be used in high tibial osteotomy, shoulder prosthesis implantation, tibial prosthesis implantation or ankle prosthesis implantation.Linvention concerne un guide chirurgical (200) spécifique à un patient comprenant : au moins un élément de guidage (202a, 202b) destiné à guider un instrument chirurgical pour traiter une structure anatomique sous-cutanée (100, 101) du patient, et un premier élément de contact (201) spécifique à un patient comprenant une première surface de contact (2010) spécifique à un patient destinée à sadapter à une partie de ladite structure anatomique sous-cutanée (100, 101), ladite ou
