A stroller frame folding mechanism, in which the frame is equipped with two sets of locks, one for each side of the frame, whereas each set of locks includes the first slave lock (1; 2), the second slave lock (3; 4) and a slider (5), whereas the slider (5) is connected via a fixed linkage (8) with the first latch (6) placed in the movable part (1) of the first slave lock, whereas the first latch (6) in the closed position is inserted into the slot of the fixed part (2) of the first lock, whereas the flexible linkage (9) is connected with the movable part (1) of the first lock from one side, and, from the other, with the second latch (7) inserted into the movable part (3) of the second lock, whereas the second latch (7) in the closed position is inserted into the slot of the fixed part (4) of the second lock.