The Roman Missal, which can also be called as "Book of the altar, the celebrant sentence or book" is the official book by which the Church celebrates the Eucharist, containing the prayers of the Mass. We can say that consists of three parts: an introductory section with documents enactment of the book and the respective rules, the body of the missal itself where are the liturgical forms and an appendix, the following indexes. For its use the Lectionary readings. The complement of the Liturgical Calendar - Pastoral each year is required to meet the various Masses without failure and everyday celebrations.

It is extremely useful for performing work lay aid to the altar or the word, both acolytes and readers, instituted or occasional, with the contents and structure of the Missal, the better to help the celebrant. In two consecutive articles we will analyze briefly.