In the Western Church of the Early and High Middle Ages, a sacramentary was a book used for liturgical services and the mass by a bishop or priest. Sacramentaries include only the words spoken or sung by him, unlike the missals of later centuries that include all the texts of the mass whether read by the bishop, priest, or others. Also, sacramentaries, unlike missals, include texts for services other than the mass such as ordinations, the consecration of a church or altar, exorcisms, and blessings, all of which were later included in Pontificals and Rituals instead.

In the late 20th century, the word sacramentary was used in the United States and some other English-speaking countries for the English translation of the Roman Missal, particularly those that, like earlier sacramentaries, omitted parts of the Mass not said by the priest.

Other books used in the celebration of Mass included the Graduale (texts mainly from the Psalms, with musical notes added), the Evangeliarium or Gospel Book, and the Epistolary with texts from other parts of the New Testament, mainly the Epistles (letters) of Saint Paul.

In late mediaeval times, these books began to be combined, for the use of priests saying Mass without the assistance of a choir and other ministers. This led to the appearance of the Missale plenum ("full or complete Missal") containing all the texts of the Mass (without the music of the choir parts).

Pope Pius V published in 1570 an official version of such a Missal, known as the Roman Missal.

At the behest of the Second Vatican Council, Pope Paul VI greatly increased the amount of Sacred Scripture read at Mass and, to a lesser extent, the prayer formulas. This necessitated a return to having the readings in a separate book, known as the Lectionary. A separate Book of the Gospels, with texts extracted from the Lectionary, is recommended, but is not obligatory. The Roman Missal continues to include elaborate rubrics, as well as antiphons etc., which were not in sacramentaries.

Of the textual groups of sacramentaries of the Roman Rite still extant, either complete or in part, the most important are the three known by the names Leonine, Gelasian, and Gregorian.

The "Leonine Sacramentary" is the oldest. Only one manuscript of it is known, written in the seventh century. This manuscript was found in the library of the cathedral chapter of Verona, was published by Joseph Bianchini in 1735, and was by him attributed arbitrarily to Pope Leo I (440-61). On the strength of this attribution the book still bears the name Leonine. It represents a pure Roman use with no Gallican elements. But it is not a book compiled for use at the altar. The confusion of its parts shows this. It is a fragment, containing no Canon nor Ordinary of the Mass, but a collection of Propers (Collects, Secrets, Prefaces, Postcommunions, and Orationes super populum), of various Masses with ordination forms, arranged according to the civil year. It begins in the middle of the sixth Mass for April, and ends with a blessing for the font "In ieiunio mensis decimi" (i. e. the winter Ember days). In each month groups of Masses are given, often very large groups, for each feast and occasion. Thus, for instance, in June we find twenty-eight Masses for St Peter and St Paul, one after another, each headed: "Item alia"; there are fourteen for St Lawrence, twenty-three for the anniversary of a bishop's consecration, and so on. Evidently the writer has compiled as many alternative Masses for each occasion as he could find. In many cases he shows carelessness. Many of his Masses in natali episcoporum have nothing at all to do with that anniversary, and are really Masses for Sundays after Pentecost; in the middle of a Mass of St Cornelius and St Cyprian he has put the preface of a Mass of St Euphemia, a Mass for the new civil year is inserted among those for martyrs; Masses for St Stephen's day (26 December) with evident allusions to Christmas are put in August, obviously through a confusion with the feast of the finding of his relics (3 August).