Redemptoris missio (Latin for The Mission of the Redeemer), subtitled On the permanent validity of the Church's missionary mandate, is an encyclical by Pope John Paul II published on 7 December 1990.

The release coincided with the twenty-fifth anniversary of Vatican II's Decree on the Church's Missionary Activity, Ad gentes.

The most striking part of the document is the fourth chapter where the Pope details what is involved in the mission Ad gentes to the non-Christian world.

[5] The encyclical is a successor to Vatican II documents including Lumen gentium and Ad gentes.

- Redemptoris missio §39 "Like the apostles after Christ’s Ascension, the Church must gather... in order to pray for the Spirit and to gain strength and courage to carry out the missionary mandate."