A holding device fastening a part (1) to a frame (3). The holding device has an upper bracket (5) fastened to the frame (3), a lower bracket (6) fastened to the frame (3) below the upper bracket (5), and a holder (7) fastened to the part (1). The holder (7) has a hook (13) and a fixing plate (14). The upper bracket (5) has a hook mount (15) shaped complementary to the hook (13). The hook (13) is hung in the hook mount (15). The lower bracket (6) has a plate mount (16), shaped complementary to the fixing plate (14). The fixing plate (14) is inserted into plate mount (16) the from the top. A positive-locking connection is formed between the plate mount (16) and the fixing plate (14), which secures the fixing plate (14) at right angles to an insertion direction.