We argue every day, every time we talk, to support a particular view or make excuses for a situation in which we are at a moment. When we argue, we often use the opinion of a person that we consider an authority, whether it is an older relative, a close friend or a person known to all, or whether it is the community in which we live view expressed by a maxim, a proverb or a phraseological unit. But every time we argue our point of view we do it with the intention of making the receiver to accept our position and agree with what we are saying, or with the intention to make the receiver to do something or to act in a certain way. Phraseological units, like proverbs, have a role in argumentative discourse. We will try to present phraseological units as arguments to support a certain opinion, a point of view. We will also try to present argumentative features of phraseological units in French language.