Schools are places where social interactions take place highest. Teachers, students and parents are the individuals of school management that constitute this social life place. A school’s success is closely related with its workers’ fulfilling the duties that are expected from them within an interaction. Every school has its own unique atmosphere. Many factors play an important role for this atmosphere to emerge, however the most important of these is communication skills. Hence for a school’s expected success to be accomplished a strong communication must be created. In that sense a school manager’s communicative skill is an important factor for a school’s success to be accomplished. In this research, school managers’ communicative skills on schools’ atmospheres are studied among the communication processes that exist in schools. Decreasing the problems to minimum that stem from communication, what school mangers can and may do to improve their communicative skills are explained, discussed and ordered in this research. The aim of this research is to determine the effects of school managers’ communication skills on a school’s atmosphere. Relational screening model among quantitative methods were used in this research. Target population of the study consists of teachers and school manager assistans commisioned in official state schools in Istanbul from the districts of Sultanbeyli, Tuzla and Pendik. In this target population, total of 378 teachers constituted the sampling group, determined through random selection method.