A hinge comprising at least one leaf part mountable to a movable leaf and equipped with at least one hinge axle and at least one frame part mountable to an immovable frame and equipped with at least one seat, wherein the at least one hinge axle has a cross-sectional mushroom shape inscribed in a circle, the at least one seat has a cylindrical shape with a longitudinal channel, wherein the channel shape corresponds to the shape of the stem of mushroom-shaped hinge axle and the radius of the cylindrical shape of the seat corresponds to the radius of the circle described on the mushroom-shaped hinge axle, characterized in that: the leaf part has two arms with hinge axles extending from the arms between which there is a body forming the frame part, wherein the seats are formed on both sides of the frame part in which the hinge axles are mounted, the hinge axles and their seats are formed in such a way that the stem of the mushroom-shaped axle and the longitudinal channel of the seat are directed towards the walls of the hinge adjacent to the side of the frame and the leaf when the hinge is attached to them, wherein in an open position the heads of the hinge axles rotate freely in the seats and in a closed position the mushroom stem of each hinge axle is set in the longitudinal channel of the respective seat, and wherein if the mushroom stems of both hinge axles are aligned precisely with the longitudinal channels of the seats, linear displacement of the leaf part together with the leaf attached to it causes the linear displacement of the hinge axles and the setting of the mushroom stems of the hinge axles to the longitudinal channels of the seats, and the hinge is provided with a blocking unit (8, 9) for immobilizing the hinge axels in the seats, comprising an arcuate recess formed in the side wall of the body forming the frame part and a movable element fixed to the leaf part between its arms and being insertable in the arcuate recess, wherein in order to block the closed position the movable element rotates to the position where it is in the arcuate recess of the body part of the frame part and prevents slipping the mushroom stem of each hinge axle from the longitudinal channel of the seat. the leaf part has two arms with hinge axles extending from the arms between which there is a body forming the frame part, wherein the seats are formed on both sides of the frame part in which the hinge axles are mounted, the hinge axles and their seats are formed in such a way that the stem of the mushroom-shaped axle and the longitudinal channel of the seat are directed towards the walls of the hinge adjacent to the side of the frame and the leaf when the hinge is attached to them, wherein in an open position the heads of the hinge axles rotate freely in the seats and in a closed position the mushroom stem of each hinge axle is set in the longitudinal channel of the respective seat, and wherein if the mushroom stems of both hinge axles are aligned precisely with the longitudinal channels of the seats, linear displacement of the leaf part together with the leaf attached to it causes the linear displacement of the hinge axles and the setting of the mushroom stems of the hinge axles to the longitudinal channels of the seats, and the hinge is provided with a blocking unit (8, 9) for immobilizing the hinge axels in the seats, comprising an arcuate recess formed in the side wall of the body forming the frame part and a movable element fixed to the leaf part between its arms and being insertable in the arcuate recess, wherein in order to block the closed position the movable element rotates to the position where it is in the arcuate recess of the body part of the frame part and prevents slipping the mushroom stem of each hinge axle from the longitudinal channel of the seat.