Benevolent and positive humor is an important factor in relieving stress. Through objective findings, conversations, surveys, assumptions checks, opinions of competent respondents as well as the opinions of some authors and discussions it is undoubtedly concluded that it is welcome in classes. The goals of the research were to examine students' attitudes about teacher humor, its consequences, and the experience of successful and unsuccessful humor in class. 112 students from Croatia participated in the research, and the data was collected through an online questionnaire that contained demographic questions, statements about teacher humor, and open questions about student reactions to successful and unsuccessful attempts of teacher humor. The main results are visible in the attitudes of the majority of students who, according to their claims, have a positive attitude towards it and recognize its advantages because humor relieves them of stress, they consider it fun, it creates a playful environment and encourages learning, which is undoubtedly shown by the results of this work. Research has shown that students perceive inappropriate humor as harmful to the quality of teaching, especially when it is offensive or inappropriate, which can create an uncomfortable atmosphere and reduce trust in teachers. Excessive use of such humor can also be experienced as a waste of time and a distraction from the main learning goals.