Abstract
Observing social changes in the world, one can easily notice the current need of the involvement of all Christians in the missionary work of the Catholic Church. Many of the papal and conciliar statements show the different aspects of a constant and urgent need of the evangelisation of the present-day world. The evangelisation bears witness to faith, Christian maturity and religious formation. It also bears testimony to moral responsibility for those who have not met Jesus Christ yet. This is why the aim of the study was to show a range of people who, more or less consciously, are engaged in the evangelisation by their affiliation to the Church. Conveying the Gospel in its general meaning is a task of every baptized man. However, a special place in this mission have priests, consecrated people and secular missionaries. They consciously, voluntarily and directly undertake their missionary and evangelisatory work. Their full cooperation enables the Church to take concrete actions to which it is summoned.