The authors examine the feeling of boredom as it has been dealt with philosophers, psychologists and writers of fiction. Then the authors tentatively analyse boredom psychology regarding man-world relationship. The psychiatric aspects of boredom are subsequently tackled: it works as a warning light and it reveals the yearning to overcome one's own finitudo and to transcend one's own disappointing subjectivity. That is why boredom is absent in the gravest manifestations of psychiatric diseases.