Complete cross-bite is one of the most common malocclusion. It always causes food impaction, caries and periodontitis. It also interferes with the fabrication of prosthesis. This case report presents the result of local treatment with bite plate and inter arch elastics in a 21 years old female. She lost her lower, left first molar. But it is impossible to get her lower, left bridge because of her complete cross-bite of left second premolars. After treatment for 4 months, the complete cross-bite was corrected.