The definition of learning disabilities has been argued and modified. One of the main arguments is about the discrepancy between abilities and achievements, and another one is about the social competence of children with learning disabilities. Their low achievements can affect their social competence and conversely low social competence can affect their achievement. Children with low social competence used to be rejected from their peer and it can result in emotional and behavioral problems. Social competence is the ability to use social skills effectively for interaction in their social situations. The concepts between social competence and social skills have been confused, but now social skills are considered as a component of social competence. The social skills, age, problem behavior and academic achievement are considered as the predictive variables for social competence. The study of social competence of children with learning disabilities is important because it predicts children`s achievements, behavioral problems, social skills, peer-relations, and adaptational problems after childhood. Now the prevalence of learning disabilities is increasing. So we need to recognize social competence and related problems of children with learning disabilities for more effective instructional intervention.