Dynamic biasing splint comprising a) two splint parts (5, 6) connected to each other by a joint for being pivoted about a pivot axis of the splint parts (5, 6) and b) a spring device, the spring bases (25, 26) of the spring device each being coupled to one of the splint parts (5, 6) in a way such that ba) a pivoting of the splint parts (5, 6) leads to a changed bias of the spring device and bb) the spring device applies a biasing moment on the splint parts (5, 6) acting towards a biasing position of the splint parts (5, 6), the biasing position being a position with a maximum extension, c) the spring device being designed such that and being coupled to the splint parts (5, 6) such that the absolute value of the biasing moment increases when approaching the biasing position of the splint parts (5, 6) and d) a switching mechanism being provided which is actuated by motion by the pivoting movement of the splint parts (5, 6) and which when actuated changes the coupling (43, 44) of the splint parts (5, 6) to the spring device and e) the biasing position of the splint parts (5, 6) being defined by a stop of the biasing splint (13, 18) and f) the spring device being a longitudinal spring, the spring force depending on an elongation in longitudinal direction, characterised in that g) the switching mechanism is provided in that in a first pivoting region of the splint parts (5, 6) the longitudinal spring is exclusively coupled via the spring bases (25, 26) of the longitudinal spring to the splint parts (5, 6) whereas in a second pivoting region of the splint parts (5, 6) the longitudinal spring is additionally supported between the two spring bases (25, 26) on a support of the biasing splint and deflected by the support. a) two splint parts (5, 6) connected to each other by a joint for being pivoted about a pivot axis of the splint parts (5, 6) and b) a spring device, the spring bases (25, 26) of the spring device each being coupled to one of the splint parts (5, 6) in a way such that ba) a pivoting of the splint parts (5, 6) leads to a changed bias of the spring device and bb) the spring device applies a biasing moment on the splint parts (5, 6) acting towards a biasing position of the splint parts (5, 6), the biasing position being a position with a maximum extension, ba) a pivoting of the splint parts (5, 6) leads to a changed bias of the spring device and bb) the spring device applies a biasing moment on the splint parts (5, 6) acting towards a biasing position of the splint parts (5, 6), the biasing position being a position with a maximum extension, c) the spring device being designed such that and being coupled to the splint parts (5, 6) such that the absolute value of the biasing moment increases when approaching the biasing position of the splint parts (5, 6) and d) a switching mechanism being provided which is actuated by motion by the pivoting movement of the splint parts (5, 6) and which when actuated changes the coupling (43, 44) of the splint parts (5, 6) to the spring device and e) the biasing position of the splint parts (5, 6) being defined by a stop of the biasing splint (13, 18) and f) the spring device being a longitudinal spring, the spring force depending on an elongation in longitudinal direction, characterised in that g) the switching mechanism is provided in that in a first pivoting region of the splint parts (5, 6) the longitudinal spring is exclusively coupled via the spring bases (25, 26) of the longitudinal spring to the splint parts (5, 6) whereas in a second pivoting region of the splint parts (5, 6) the longitudinal spring is additionally supported between the two spring bases (25, 26) on a support of the biasing splint and deflected by the support.