This chapter provides detail description of Functional rhinoplasty. Introduction to functional rhinoplasty is given in the beginning. Chapter has 21 well illustrated diagrams and pictures. Septal surgery, deviated nasal septum, turbinate surgery, internal valve, external valve surgery, modified M plasty, butterfly graft, Spreader graft flap, management of inferior turbinate are described in detail. 2 tables are added to highlight pathological conditions of nasal septum and lateral nasal wall and use of SL classification. 53 references are included at the end of the chapter to facilitate further reading.