Jumu'ah (Arabic: جمعة‎) (also known as jum'ah, Friday prayer, etc.) is a congregational prayer (salat) that Muslims hold every Friday, just after noon in lieu of dhuhr. It is mentioned in the Qur'an as:

O you who believe! when the call is made for prayer on Friday, then hasten to the remembrance of God and leave off trading; that is better for you, if you know. (Qur'an 62:9)

And when the prayer is ended, then disperse in the land and seek of Allah's bounty, and remember Allah much, that ye may be successful. (Qur'an 62:10)

The jumu'ah prayer is half the dhuhr prayer, for convenience, preceded by a khutba (a sermon as a technical replacement of the two reduced raka'ahs of the ordinary dhuhr prayer), and followed by a communal prayer, led by the imam. In most cases the khaṭīb also serves as the imam. Attendance is strictly incumbent upon all free adult males who are legal residents of the locality, women also go to Friday prayers and have a section that is separated from men, in which they pray with fellow Muslim women.

The Jumu'ah prayer begins with the call to prayer the muezzin makes; then the adhan, which marks the beginning of jumu'ah. Once the khaṭīb has given his speech, he concludes with a du'a, which then leads the muadhin to make the iqama which is followed by the two rak'at prayer.

The prayers mainly have high attendance of worshipers, as compared to the ritual prayers. In Turkey for example, the ritual prayers are performed regularly by 44%, whereas going to Friday prayers was more regularly attended by 56% (25% responded that they sometimes attended and 19% that they never did). Females also go to the Mosque to perform the Friday prayers. Friday prayer is obligatory on all free Muslims.

Abu Hurayrah reported that Muhammad said: "When it is Friday, the angels stand at every door of the mosque and record the people in order of arrival, and when the Imam sits on the pulpit for delivering the sermon, qutba, they fold up their sheets and listen to the mention of Allah, the speech."

A person who goes to Friday prayer is said to have his sins between that Friday and last forgiven.