This paper is a study on the moral education method to develop moral literacy. Moral literacy is the capacity to practice moral action, to develop moral judgment, moral motivation and moral sensitivity. Moral literacy of elementary school students grows influenced by their personal and socio-cultural environment. Elementary school students are the digital generation affected by the digital environment. However, their social and cultural tendencies are being strengthened due to the COVID-19 infection. Digital culture that emphasize to fun and immediacy, participation and sharing, expression and communication in the digital world are leads to weakening of moral literacy. The purpose of this study is to set the direction of moral method for use 「Oedipus Rex」at elementary school morals class.