This study investigates the classroom climate in two settings of the 6th-grade class (a setting of children with special needs and a setting without children with special needs), focusing on aspects of satisfaction and cohesiveness on one side and friction, competitiveness and difficulties on the other. The study results indicate the existence of both positive and negative consequences of the integration of hearing-impaired pupils. Heterogeneity achieved by the presence of children with special needs included positive benefits for all pupils in the mainstream classroom and helped to prevent friction and a competitive atmosphere, and provided opportunities for accepting exceptionalities, and developing social skills, ethical values and empathic abilities among school peers. On the other hand was concern related to difficulties of cognition, the only dimension on which comparative settings statistically and significantly differed concerning the classroom climate with integrated pupils. (Contains 4 tables.)