One of the most notable congenital malformations in the head and neck include cleft lip, palate & alveolus. It may manifest as unilateral or bilateral and complete or incomplete. Reconstruction of the alveolar cleft is challenging and has ever remained controversial with regard to timing, graft materials, surgical techniques, and methods of evaluation. The primary goal of alveolar cleft reconstruction in is to provide a bony bridge at the cleft site that allows maxillary arch continuity, oronasal fistula repair, eruption of the permanent dentition into the newly formed bone, enhances nasal symmetry through providing alar base support, orthodontic movement and placement of osseointegrated implants when indicated. In addition to these it also enhances speech, periodontal conditions, establishes better oral hygiene, and limits growth disturbances. In order to rehabilitate oral function in patients with cleft lip and or palate, alveolar bone grafting is necessary. Secondary bone grafting is the most widely accepted method for treating alveolar clefts. Literature shows that autogenous bone graft is the primary source for reconstructing alveolar cleft defects and is currently the preferred grafting material. However, it is believed that the use of a membrane in conjunction with an autogenous bone graft for alveolar ridge augmentation provides superior results. Hence, this paper reviews the role of collagen membrane in alveolar bone grafting.