Lid stay comprising: a base body, at least one drive disc, which is attached pivotably around a pivot axis to the base body, an actuator supported on the at least one drive disc for pivoting the at least one drive disc about the pivot axis, an actuating arm which is held pivotably relative to the at least one drive disc, and a locking mechanism, wherein in a released state of the locking mechanism the actuating arm is pivotable relative to the at least one drive disc and in a locked state of the locking mechanism the actuating arm is held non-rotatably on the at least one drive disc, so that in the locked state the actuating arm and the at least one drive disc are jointly pivotable about the pivot axis in both pivot directions, characterized in that the locking mechanism is designed and arranged in such a way that, starting from the released state, the locking mechanism is transferred into the locked state exclusively by a pivoting movement of the actuating arm relative to the at least one drive disc, wherein the locking mechanism comprises at least one locking pair which cooperates in the locked state and the at least one locking pair comprises a locking projection (14; 26) and a locking recess (15; 27), wherein the at least one locking projection (14; 26) and the at least one associated locking recess (15; 27) are distributed between the actuating arm and the at least one drive disc and are associated to one another in such a way that, starting from the released state, the locking mechanism is transferred into the locked state exclusively by a pivoting movement of the actuating arm relative to the at least one drive disc. a base body, at least one drive disc, which is attached pivotably around a pivot axis to the base body, an actuator supported on the at least one drive disc for pivoting the at least one drive disc about the pivot axis, an actuating arm which is held pivotably relative to the at least one drive disc, and a locking mechanism, wherein in a released state of the locking mechanism the actuating arm is pivotable relative to the at least one drive disc and in a locked state of the locking mechanism the actuating arm is held non-rotatably on the at least one drive disc, so that in the locked state the actuating arm and the at least one drive disc are jointly pivotable about the pivot axis in both pivot directions, characterized in that the locking mechanism is designed and arranged in such a way that, starting from the released state, the locking mechanism is transferred into the locked state exclusively by a pivoting movement of the actuating arm relative to the at least one drive disc, wherein the locking mechanism comprises at least one locking pair which cooperates in the locked state and the at least one locking pair comprises a locking projection (14; 26) and a locking recess (15; 27), wherein the at least one locking projection (14; 26) and the at least one associated locking recess (15; 27) are distributed between the actuating arm and the at least one drive disc and are associated to one another in such a way that, starting from the released state, the locking mechanism is transferred into the locked state exclusively by a pivoting movement of the actuating arm relative to the at least one drive disc.