圣餐是基督徒的重要礼仪，基督徒认为，圣餐的直接根据来自《新约圣经》，圣经中记载耶稣基督在被钉十字架上死的晚上，与十二门徒共进逾越节晚餐。

在基督教会创建之后，举办圣餐礼逐渐制度化。根据圣经的记载，哥林多教会在领圣餐时的态度不够严谨，使徒保罗立即加以纠正（《哥林多前书》第11章第17节至第34节_参） 。

天主教将圣餐称为圣体圣事，为七件圣事之一，并相信无酵饼和葡萄酒在神父祝圣时化成基督的体血（神学术语中称之为「变体」，trans-substantiation）。基督新教徒一般不认同此观点。

The Eucharist /ˈjuːkərɪst/ (also called Holy Communion, the Lord's Supper, and other names) is a rite considered by most Christian churches to be a sacrament. According to the New Testament, it was instituted by Jesus Christ during his Last Supper. Giving his disciples bread and wine during the Passover meal, Jesus commanded his followers to "do this in memory of me" while referring to the bread as "my body" and the wine as "my blood". Through the Eucharistic celebration Christians remember Christ's sacrifice of himself once and for all on the cross. Uniquely, in the one prayer given to posterity by Jesus, the Lord's Prayer, the word epiousios -- which does not exist elsewhere in Classical Greek literature -- has been linguistically parsed to mean "super-substantial," and most literally interpreted as a reference to the Bread of Life, the Eucharist.