Foldable wiper plate comprising: • an hinged adapter for attaching a handle, • a fixable plate wing hinged to the hinge adapter so as to pivot about a first pivot axis, and • a pivotable, passive plate wing, • latching means for automatically locking the fixable plate wing when transferred to a position of use in which the bottom sides of the fixable plate wing and the passive plate wing lie in one plane, and comprising • a user-operable actuating means for releasing the latching means, wherein the fixable plate wing fixes the passive plate wing in the position of use and releases it as a result of its pivoting after the latching means have been released, wherein the latching means being arranged on the hinged adapter on the one hand and on the fixable plate wing on the other hand, wherein the latching means being arranged at least on one side of the latching connection on a structural member which is elastically deformable at least in sections or on a laterally displaceable structural member which is supported slidably on the hinged adapter and the actuating means can be urged against the elastically deformable structural member by means of a pressure section, which is capable of displacing an elastically deformable or displaceable section of the structural member in such a way that the latching means are disengaged and the fixable plate wing is released. • an hinged adapter for attaching a handle, • a fixable plate wing hinged to the hinge adapter so as to pivot about a first pivot axis, and • a pivotable, passive plate wing, • latching means for automatically locking the fixable plate wing when transferred to a position of use in which the bottom sides of the fixable plate wing and the passive plate wing lie in one plane, and comprising • a user-operable actuating means for releasing the latching means, wherein the fixable plate wing fixes the passive plate wing in the position of use and releases it as a result of its pivoting after the latching means have been released, wherein the latching means being arranged on the hinged adapter on the one hand and on the fixable plate wing on the other hand, wherein the latching means being arranged at least on one side of the latching connection on a structural member which is elastically deformable at least in sections or on a laterally displaceable structural member which is supported slidably on the hinged adapter and the actuating means can be urged against the elastically deformable structural member by means of a pressure section, which is capable of displacing an elastically deformable or displaceable section of the structural member in such a way that the latching means are disengaged and the fixable plate wing is released. the fixable plate wing fixes the passive plate wing in the position of use and releases it as a result of its pivoting after the latching means have been released, wherein the latching means being arranged on the hinged adapter on the one hand and on the fixable plate wing on the other hand, wherein the latching means being arranged at least on one side of the latching connection on a structural member which is elastically deformable at least in sections or on a laterally displaceable structural member which is supported slidably on the hinged adapter and the actuating means can be urged against the elastically deformable structural member by means of a pressure section, which is capable of displacing an elastically deformable or displaceable section of the structural member in such a way that the latching means are disengaged and the fixable plate wing is released.