Door hinge for concealed installation for rotatably connecting a door leaf to a door frame with three-dimensional adjustability and an internal adjusting unit consisting of a) two receiving bodies (1, 2) which can be inserted in the frame and the door leaf and which form hinge parts, b) two joint bodies which are rotatably connected to one another through a central axis and which are each rotatably connected to the receiving bodies (1, 2) via an axis, wherein the joint bodies can dip into a recess of the receiving bodies (1, 2) and the position of the axes relative to the receiving bodies (1, 2) cannot be changed, c) front plates (17, 18) which connect the receiving bodies (1, 2) to the frame and to the door leaf, d) at least one adjusting unit which is inserted in one of the hinge parts, e) clamping screws for fixing the position of one of the receiving bodies relative to the front plates by pressing a respective front plate and a clamping plate against the lateral extension of the receiving body, characterized in that the adjusting unit consists of a rotation axle and an adjusting disc eccentrically connected thereto, by which, when the clamping screws are loosened, the receiving body (1, 2) can be changed in terms of its position relative to the front plates (17, 18) in one direction by rotating, wherein the adjusting disc is inserted in a pocket (11, 15) in the front plate, in a middle plate arranged between the front plate and the lateral extension, or in the lateral extension of the receiving body (1, 2), wherein the middle plate is fixedly connected to the front plate or the front plate and the middle plate are manufactured from one part, wherein the pocket (11, 15) corresponds in terms of height to the diameter of the adjusting disc, and wherein, if the pocket is provided in the front plate or the middle plate, the rotation axle is displaceable on the front plate in a longitudinal direction of the receiving body (1, 2) in a slot of the front plate by rotating the rotation axle, wherein the part of the rotation axle that engages through a cutout in the lateral extension of the receiving body displaces the receiving body in terms of its position relative to the front plates and, if the pocket is provided in the lateral extension of the receiving body (1, 2), is mounted in a stationary manner in the direction of displacement of the receiving body (1, 2), wherein the front plate forms a stationary counter-bearing, in which the rotation axle is mounted in such a way as to be able only to rotate. a) two receiving bodies (1, 2) which can be inserted in the frame and the door leaf and which form hinge parts, b) two joint bodies which are rotatably connected to one another through a central axis and which are each rotatably connected to the receiving bodies (1, 2) via an axis, wherein the joint bodies can dip into a recess of the receiving bodies (1, 2) and the position of the axes relative to the receiving bodies (1, 2) cannot be changed, c) front plates (17, 18) which connect the receiving bodies (1, 2) to the frame and to the door leaf, d) at least one adjusting unit which is inserted in one of the hinge parts, e) clamping screws for fixing the position of one of the receiving bodies relative to the front plates by pressing a respective front plate and a clamping plate against the lateral extension of the receiving body,