Anorectal malformations (ARM) comprise a wide spectrum of anomalies. Anorectal malformations are relatively coom congenital anomaly. Anorectal malformations include a series of anomalies ranging from a slight covered anus to much more complex anomalies including cloaca and cloacal exstrophy. This chapter discusses the classification, clinical features, diagnosis and treatment of anorectal malformations.