Ancient Iranians assigned a special significance to etiquette and companionship, respect to the king, elders and parents, as well as manner of talking, eating, gift giving, confidentiality, honesty, and such things that Iranians would comply when they interact with each other. We surveyed this issue in two ways: people's relationship with the king and people's interaction with each other from Median time till the end of Sassanid rule. So, this article seeks to survey the ancient Iranian etiquette and companionship. Thus, it seems that observing etiquette and companionship with king over this period had gained extra formalities and luxuries and people assigned the king a different character above others. But observance of this manner among people had a moral basis, and survived almost in the same way.