Social climate in the schools is produced by students and teachers together. Article is concerned with classes especially by teachers. Under the Gibb's theory L.B. Rosenfeld means, that teacher may produce Iwo essential climale in his class: supporlive and defensive. L. B. Rosenfeid's Communicalion Climate Questionnaire was used; 924 schoolsmales (368 boys, 556 girls) have described their 90 teachers (35 men, 55 women). This ressearch discovered, that younger teacher are more supportive, teachersmen are more defensive. Schoolmate's feeling climate depends on teacher's evaluation of his work, girls are more sensitive to supportive climale and every schoolmates wish to have more supporlive climate in their classes than they actually have.