Diastema is the opening seen between teeth, or mesiodistal spaces caused by differences in jaw and tooth sizes.In this case, aesthetic treatment of the diastemas of the anterior teeth was performed with direct composite resin restorations on the tooth surfaces in a single session without any preliminary preparation. First, the appropriate color tone of the composite resin was selected according to the natural teeth.The tooth surfaces were roughened with 37% orthophosphoric acid and a two-stage self-etch adhesive was applied according to the manufacturer's instructions. Then, the diastemas were closed by shaping the composite resin with transparent bands. Finally, finishing and polishing operations were carried out using yellow band diamond bur and composite polishing discs respectively.The aesthetic expectations of the patient disappeared in a single session. It has been observed that direct composite restoration is a successful treatment option when adequate oral hygiene motivation is provided in patients with aesthetic complaints.