A method is provided for mounting a backrest structure (1) of a vehicle rear seat. The method includes the following steps: arranging a bearing bush (15) on a cylindrical bearing pin (11) provided in a lower lateral corner segment of a backrest structure (1), inserting the bearing bush (15) into a cut-out (17) of a body-side backrest bearing (2a, 2b), pivoting the backrest structure (1) inserted into the backrest bearing (2a, 2b) forward about a bearing axis (12) of the bearing pin (11) until a blocking segment (22b, 122b) of the bearing bush (15) locks in and/or engages behind a blocking element (22a, 122a) of the backrest bearing (2a, 2b). A pivot support of a fold-over backrest structure (1) of a vehicle rear seat is also provided.