Patient compliance is a critical factor in the efficacy of orthodontic treatment. Major treatment decisionshinge on the expected level of compliance and poor cooperation usually prevents the orthodontist fromrealizing optimal treatment results. Although the knowledge and skills of the clinician remain significant,the cooperation of patients and that of the parents, in the case of children and adolescent patients, plays amajor role in achieving the desired orthodontic results. Patient cooperation is the single most importantfactor every orthodontist must contend with. This article deals with patient compliance in orthodontics,reasons for poor patient compliance and methods to improve patient compliance