Conscience is the heart of man. It is the last norm of man's actions that tells his depth what to do and what to avoid. It is always necessary to follow that voice, although sometimes it is not easy. When Christian theology talks about conscience, it says that it is God's voice to us. The voice of conscience is therefore not something that is outside of us, but something that is within us, something that we are born with and that needs to be nurtured and raised. Its most important characteristic is the distinction between good and evil. The call to conscience, especially nowadays, is a topic that occupies a lot of space in public and social life. Although the subject of the appeal of conscience is very broad and inexhaustible, here we will talk only about some elements concerning the appeal of conscience and moral action. In this paper, through three chapters, we will present the phenomenon of conscience from a theological and moral point of view. We will especially refer to the speech about conscience in the Holy Scriptures (especially Paul's epistles), talk about conscience as an elementary human right, and emphasize the dignity of the human conscience in a special way