The main focus of this chapter is on congenital dislocation of patella, intra-articular dislocation of patella, acute dislocation of patella, old unreduced dislocation of patella, recurrent, habitual and permanent dislocations of patella, medial stabilization of patella by Pes Anserinus transpositions, quadricepsplasty for habitual and permanent dislocations of patella, and proposed treatment protocol for recurrent, habitual and permanent dislocations of patella. Congenital dislocation of the patella is rare, bilateral, and often familial and accompanied by arthrogryposis multiplex congenita and Down syndrome. Diagnosis of congenital dislocation of the patella is usually overlooked and delayed till the child is 3–4 years of age when ossification of patella starts. Intra-articular dislocation of the patella is rare and is of two varieties. The most common variety is horizontal intra-articular dislocation of patella following detached quadriceps tendon with its articular surface looking towards the articular surface of the tibia. Three well-labeled and well-colored figures are also provided in this chapter.