In this research, school managers' humorous behaviors were determined according to the teachers' opinions and the effects of these behaviors on the motivation level of the teachers were tried to be determined.The research is in the survey model form. The primary and high school teacher working in Uskudar, Istanbul constitutes the target population of the research. 364 teachers, chosen by rational member sampling method, constitute the sampling of the research. To gather the data of the research; "Humour Senses Questionnaire" and "Teacher Motivation Survey" were used.According to the findings obtained, the teachers think that the school managers often show behavior to motivate the teachers in all aspects. The teachers working in primary and high schools think that the schools managers use rarely ironical humour, repudiativehumour and non-humorous humour, sometimes producting social humour, and often affirmative humour. In addition, it was seen that there is a negative and medium level relation between the managers' ironical, repudiative and non-humorous styles and the all aspects of the motivation behaviors of the teachers, and that there is a positive and medium level relation between the managers affirmative, productive social styles and the all aspects of the motivation behaviors of the teachers. (C) 2014 Published by Elsevier Ltd.