Background: Constipation is defined as infrequent passage of stools or difficulty with evacuation of stools. It is associated with various symptoms including hard stools, straining, sensation of anorectal blockage, incomplete evacuation, abdominal discomfort and bloating. Functional constipation includes three types of constipation ,normal transit constipation ,slow transit constipation and functional defecatory disorders. Dyssynergia, probably the most common presentation of functional defecatory disorders, which is an acquired behavioural defecatory disorder. In most subjects, dyssynergia is a result of poor toileting habits, painful defecation, or brain-gut dysfunction. Some patients have a history of sexual or physical abuse, or an eating disorder. In children, fecal retention may result in encopresis due to leakage of liquid stool around impacted stool. Patients with dyssynergia are unable to coordinate the abdominal, rectoanal and pelvic floor muscles during defecation, and may also demonstrate rectal hyposensitivity. Encopresis or fecal incontinence is defined as the involuntary passing of stool into inappropriate places such as the underwear in children older than four years of age,Which is the age of control . It represents severe psychological distress on children and their families. Anorectal biofeedback Therapy acts as a rehabilitation program by means muscle contraction and relaxation exercises with the aid of verbal, visual and auditory guidance.