The present invention concerns a therapeutic splint (1) for treating one or more joint areas of a patient, the splint (1) comprising longitudinal housings (2) extending along a longitudinal axis (L) and arranged parallel to this longitudinal axis (L)； one or more modular cartridges (3) having a therapeutic effect suitable for being arranged in said housings (2) according to said joint area or areas to be treated, characterised in that - the splint (1) further comprises at least one transverse and/or oblique housing (4) extending along one or more axes (O), respectively, that are transverse and/or oblique relative to said longitudinal axis (L) of the splint (1), - the transverse and/or oblique housing (4) is arranged in such a way as to cover an area that extends around a joint to be treated, and - the modular cartridge or cartridges (3) are arranged in said transverse and/or oblique housings (4) according to said joint area or areas to be treated.
