A hinge mechanism includes first torsion shafts, a first torsion sleeve, second torsion shafts, a second torsion sleeve, a first fixing assembly, a second fixing assembly and a third fixing assembly. The first torsion sleeve is sleeved on the first torsion shafts to link the first torsion shafts. The second torsion sleeve is sleeved on the second torsion shafts to link the second torsion shafts. The first and the second torsion sleeves interfere with each other, so the adjacent first and second torsion shafts drive each other to move. The first fixing assembly is engaged with the adjacent first and second torsion shafts respectively. The second fixing assembly is engaged with the first torsion shaft away from the second torsion shafts. The third fixing assembly is engaged with the second torsion shaft away from the first torsion shafts. The first, second and third torsion shafts interfere with each other.