Aim: The aim of this study was to compare the stress distribution under artificial forces that simulate the biting forces of the two different post types used in maxillary anterior teeth that had complicated crownroot fractures and to determine the region where the stress occurred. For this purpose, a finite element analysis method was used. Material and method: In the study, Glass fiber post (Group I) and carbon fiber post (Group II) were used to model tooth with complicated crown-root fracture, which would be horizontal in the cervical region of the fracture line. In the model, fractured teeth fragment (coronal and root fragments) were reattachment to by post. The force of 100N was applied to the incisal of the teeth at 90 0 angles to the groups (longitudinal axis). Finite element analysis method was used to evaluate stress resulting from force and to obtain a three-dimensional model. Analyzes were done with the ANSYS program (ANSYSRel.6.0, ANSYS Inc., Houston, TX, USA). Results: As the results of the analysis, the resistance of glass fiber post against the forces was higher than the carbon fiber post. The stresses were concentrated mostly at the palatinal regions in group I and II. Conclusion: The rehabilitation of esthetic and functional for anterior group teeth with complicated crown-root fractures was favorable glass fiber post than carbon fiber post.