It is necessary for teachers to know children’s cognition of life and death before they introduce some topics concerning bio-ethics into biology education at schools. We made a questionnaire for elementary school pupils to know their experience of breeding and their cognition of life and death.
About 90% of the respondents had experienced breeding and gave some responses such as burying the carcass when the raised animal had died. 70% of the respondents believed in the presence of soul or spirit. In case of human beings, however, the connection between life and death and soul seemed to be weak in most of the respondents because they thought the death of a human being should be expressed as heart death or brain death. In addition, some differences in the cognition of life were observed between the male and female respondents.