The Missionaries of the Sacred Heart of Jesus (MSC; Latin: Missionarii Sacratissimi Cordis; French: Missionnaires du Sacré-Coeur) are a missionary congregation in the Catholic Church. It was founded in 1854 by Servant of God Jules Chevalier (1824–1907) at Issoudun, France, in the Diocese of Bourges.

Jules Chevalier, the founder of the Chevalier Family, had a vision of a new world emerging and he wanted to make known the Gospel message of God's love and care for all men and women and to evoke a response in every human heart. He especially valued love, concern, compassion, understanding, respect, and acceptance of every individual. His vision was based on the words of Jesus:

I give you a new commandment, love one another. Just as I have loved you, you also must love one another. By this love you have for one another, everyone will know that you are my disciples. [John 13:34 ff]

The motto of the Missionaries of the Sacred Heart is: May the Sacred Heart of Jesus be loved everywhere![1] The priests, deacons, and brothers of the Missionaries of the Sacred Heart are known as MSCs (from the Latin, Missionarii Sacratissimi Cordis). As with most religious congregations in the Catholic Church, there is significant involvement on the part of the laity, who may also serve on the missions. The international headquarters is in Rome with numerous communities throughout the world.