The aim of this study is to investigate accidents occurred in elementary science laboratories and reveal reasons of these accidents. Some suggestions were developed about how teachers' could behave at the time of laboratory accidents which could be frequently. The present study is a case study included quantitative study. The accidents to be take placed in the local and national newspapers were searched and discussed over the cases. When the news were analyzed, it was seen that the accidents related with explosions of experiment tubes, spirit, steel tubes and ampul, diffusion of chemicals, gas rising and breaking of mercury tubes. Mainly reasons of these accidents are; absence or misconceptions of knowledge of characteristics of chemicals, to not know how intervening when chemicals are spilled, carelessness during experiment, students' using of experiment equipments without teachers' control and to not know how developing a behaviour manner toward experimental hazards.