In order to compare mechanical properties between various types of small bone fixators, hollow maple dowels are uniformly produced to simulate small bones in this study. Furthermore, transverse osteotonmy with 2mm gap, and 45°oblique osteotomies are created to simulate stable, unstable, and spiral fractures. Each fractue pattern is then approximated with four types fo fixators :(1)Aesculap mini extermal fixator,(2)mini A-O plate and screw,(3)cross pin, and(4) self-assembled mini external fixator. Finally,tension,torsion, and bending tests are performed with INSTRON.Dorsal plating has the strongest tensile rigidity and lateral bending rigidity in three different fracture patterns. Aesculap mini external fixator has the strongest torsional rigidity in stable and unstable fractures. Nevertheless, mini A-o plate has the strongest torsional rigidity in 45°oblique fracture. Dorsal plating, lateral plating, and mini external fixator all have good anterior bending rigidity without significant difference in stable fracture. Furthermore, only lateral plating and mini external fixator show good anterior bending rigidity in unstable and 45°oblique fractures. Except in torsional rigidity, Aesculap mini external fixator is not significantly stiffer than the self-assembled external fixator. As expected, cross pin is the weakest fixator.In this study, differences in mechanical stiffness among four types of small bone fixators are provided. Additionally. the indication should be considered when choosing a proper fixator.Complication rate can then be lowered to achieve a successful surgery in treating small bone fractures.