The Dybbuk, or Between Two Worlds (Russian: Меж двух миров [Дибук], trans. Mezh dvukh mirov [Dibuk]; Yiddish: צווישן צוויי וועלטן - דער דִבּוּק, Tsvishn Tsvey Veltn – der Dibuk) is a play by S. Ansky, authored between 1913 and 1916. It was originally written in Russian and later translated into Yiddish by Ansky himself. The Dybbuk had its world premiere in that language, performed by the Vilna Troupe at Warsaw in 1920. A Hebrew version was prepared by Hayim Nahman Bialik and staged in Moscow at Habima Theater in 1922.

The play, which depicts the possession of a young woman by the malicious spirit – known as dybbuk in Jewish folklore – of her dead beloved, became a canonical work of both Hebrew and Yiddish theatre, being further translated and performed around the world.