In a wiper blade (100) for a windscreen wiper, having a wiper strip (112) and an adapter unit (105) for hinging the wiper blade (112) to a wiper arm, wherein the adapter unit (150) is attached at a base connection device (160) provided on the wiper strip (112) and is configured for connection to a connection member associated with the wiper arm. The adapter unit (150) includes a guide adapter (250) permanently connected to the base connection device (160) and having guide elements (352, 354, 356, 358) that are spherically curved at least in sections. The guide adapter is detachably connected to a function adapter (280) configured for connection to the connection member and including slide elements (382, 386) that are slidably displaceable on the guide elements (352, 354, 356, 358) such that the function adapter (280) is movable at least from a released position into a holding position by a combined translatory and rotary movement relative to the guide adapter (250).