A fitting assembly arranged between a fixed frame and a sash of a window or a door, comprises a fixed-frame-side support bracket, a sash-side support bracket, a scissor assembly as well as a spacer. The fixed-frame-side support bracket surrounds a fixed-frame corner of the fixed frame with a bearing leg and an additional support leg. The sash-side support bracket surrounds a sash corner of the sash with a bearing leg and an additional support-bracket leg. The spacer may either be arranged on the side of the additional support-bracket leg of the fixed-frame-side support bracket facing a first fixed-frame rebate face or on the side of the additional support-bracket leg of the sash-side support bracket facing a first sash rebate face. A scissor assembly supported on the bearing leg of the fixed-frame-side support bracket and on the bearing leg of the sash-side support bracket allows the sash to be rotationally and translationally moved with respect to the fixed frame.