The Mishnah Berurah (Hebrew: משנה ברורה "Clear Teaching") is a work of halakha (Jewish law) by Rabbi Yisrael Meir Kagan (Poland, 1838–1933, also known as Chofetz Chaim).

It is a commentary on Orach Chayim, the first section of the Shulchan Aruch which deals with laws of prayer, synagogue, Shabbat and holidays, summarizing the opinions of the Acharonim (post-Medieval rabbinic authorities) on that work.

It is widely used as a reference and has mostly supplanted the Chayei Adam and the Aruch HaShulchan as the primary authority on Jewish daily living among Ashkenazi Jews, particularly those closely associated with haredi yeshivas.

The Mishnah Berurah's "literary style can be described as follows: In relation to a given law of the Shulhan Aruch, he raises a particular case with certain peculiarities that may change the law; then, he enumerates the opinions of the Ahronim (the later authorities, of the 16th century and on) on that case, from the most lenient to the most stringent ; and finally, he decides between them.... Having displayed what we may call the "leniency-stringency spectrum", [he] actually offers the reader an array of conduct options from which he may pick the one that seems right for him.

[a] "Mishnah Berurah Yomit" is a daily study programme initiated by Vaad Daas Halacha and the Chofetz Chaim Heritage Foundation.