Nachman of Breslov (Hebrew: רַבִּי נַחְמָן מִבְּרֶסְלֶב Rabbī Naḥmān mīBreslev), also known as Reb Nachman of Bratslav, Reb Nachman Breslover (Yiddish: רבי נחמן ברעסלאווער Rebe Nakhmen Breslover), and Nachman from Uman (April 4, 1772 – October 16, 1810), was the founder of the Breslov Hasidic movement. He was particularly known for his creative parables, which drew on Eastern European folktales to create mystical and mythic fantasies and which influenced 20th century literature, probably including the works of Franz Kafka.

Nachman, a great-grandson of the Baal Shem Tov, revived the Hasidic movement by combining (the Kabbalah) with in-depth Torah scholarship. He attracted thousands of followers during his lifetime, and his influence continues today through many Hasidic movements such as Breslov Hasidism. Nachman's religious philosophy revolved around closeness to God and speaking to God in normal conversation "as you would with a best friend". The concept of hitbodedut is central to his thinking.