Students develop fear in early childhood. Fear is also one of crucial keys of the defending mechanism. In terms of evolution, fear is very important. There are certain developmental phases of fear that children go through their growing up. Before going to school, in preschool facilities, children experience of visual, acoustic and supernatural fear. In school, those fears are manifesting more in a way of concrete dangerous situations that children experience on their way to school, school hallways, playgrounds, movies, stories or informative and often pessimistic tv news and they learn how to deal with those fears. But what about those students who haven´t gotten rid of the fears from preschool facilities? What about those students who still have the same fear of situations and/or certain animals such as spiders without knowing their biology? Students are mainly uninformed about biology and ecology of a spider. Fear of a spider is one of the most common phobias that is manifesting in growing up phase. Reason for developing a fear of spiders doesn´t need to be a specific trauma connected with spiders. Cause of fear of spiders can be just the outside look of a spider as a result of its characteristic phisionomy. The main goal of this topic is to analyse the biology of a spider and the fear of spiders (arachnophobia), and to show the diversity of spiders, as well as diversity of their structure, their traits and habitation, their importance, and at the same time to reduce or remove the fear of spiders.