Abstract: Objective: To compare the marginal microleakage of fillings for wedged-shaped erosion restoration using Hawe'S tooth neck matrix band or normal plugger. Methods: Standardized Class V cavities (3mm 2mm 2mm) were prepared at the cemento-enamel junction on buccal surface of 40 recently extracted human premolars. The preparations were randomly assigned to two groups (20 for each group) according to the instrument used (group A using normal plugger and group B using Hawe'S matrix), and then restored with 3M (Filtek Z350) filling composite resin. After thermal circulation and soaked for 24 hours in 2% methyl blue solution, the specimens were cut through the midline of the restoration buccolingually and longitudinally. The microleakage at the occlusal margin and the gingival margin were observed under a stereomicroscope and the leakage depth was measured with Image-pro plus 6.0 software package.Results: Microleakage was observed in two groups. The microleakage depth of group A was (0.641±0.370) mm, and the microleakage depth of group B was (0.395±0.462)mm . Significant difference was observed between group A and group B (P<0.05). Conclusion: Hawe'S tooth neck matrix band is better than normal plugger in reducing the microleakage of fillings for wedged-shaped erosion restoration, which is worthy of wide clinic application.