The aim of this study is to present a new technique of using spreader grafts in the correction of crooked nose deformity with C-shaped deviation of the middle third of the nose. This is a prospective case series study conducted on 18 patients with crooked nose deformity with C-shaped deviation of the middle third of the nose. All of the patients were managed by open septorhinoplasty. During surgery, a curved spreader graft was harvested from the nasal septum and placed on the convex side of the C-shaped deviation of the dorsal part of the nasal septum. Objective measurements of the angles of external nasal deviation (END) and the internal nasal valve (INV) angles were performed before and 6 months after the surgery. Subjective assessment of aesthetic satisfaction by the visual analog scale and nasal function by the nasal obstruction symptom evaluation scale was also performed before and 6 months after surgery. Eighteen patients were enrolled in the study and completed the minimum follow-up period of 6 months. The mean follow-up period was 17.3 months. Objectively, there was highly significant ( P < 0.00001) improvement of the END angle and INV angle. Subjectively, there was also highly significant ( P < 0.00001) improvement of both the nasal obstruction symptom evaluation score and the visual analog scale score for aesthetic satisfaction. The insertion of a curved unilateral spreader graft over the convexity of the deviated nasal dorsum can correct the END, improve the collapsed INV on both sides, and consequently achieve satisfactory aesthetic and functional outcomes.