The traditional Jewish prayer book used for daily worship is called a siddur.
The word siddur comes from a Hebrew root meaning “order,” referring to the ordered arrangement of prayers. A siddur commonly includes the morning, afternoon, and evening services, along with blessings, hymns, psalms, and readings for ordinary weekdays and Shabbat.
Jewish communities developed different siddurim over time. Ashkenazi, Sephardi, Mizrahi, Yemenite, and Italian traditions may use different melodies, wording, and arrangements while sharing many core prayers. Some editions also include translations, commentary, or transliterations for people who do not read Hebrew.
A siddur is distinct from a machzor, which is a prayer book specifically arranged for major festivals such as Rosh Hashanah and Yom Kippur. It is also different from a Haggadah, the book used during the Passover Seder. The exact contents of a siddur vary by tradition, but its central purpose is to guide regular Jewish prayer.