Nowadays, there are several modifications of sinus lift procedures and the more complicated method is the lateral window approach. A number of maxillary models animal and plastic are used to educate the dentists and train their techniques. However it is difficult to prepare the animal maxillary model by dentist himself. When practicing sinus lifts in the plastic model, a jaw model with maxillary sinus and Schneiderian membrane is used. The plastic model is a single-use configuration and its plastic membrane is not similar to texture of sinus membrane. Therefore we develop an egg model with a simulative Schneiderian membrane. This model is an economical and realistic ways to practice the skills of sinus lift by dentists themselves.