Siddur Im Dach (Hebrew: סידור עם דא״ח) is a Hasidic prayer book written by Rabbi Schneur Zalman of Liadi, the first Rebbe of the Chabad-Lubavitch movement.

[4] The book was prepared for publication by the third Chabad Rebbe, Rabbi Menachem Mendel Schneersohn.

[3] republished in 2019 as a two volume set Siddur Im Dach contains numerous Hasidic interpretations of the Jewish prayers as well as discourses on Chabad philosophy.

According to the seventh Chabad Rebbe, Rabbi Menachem Mendel Schneerson, the laws and customs as printed in Siddur Im Dach are the most authoritative of all of Rabbi Schneur Zalman's works including the Shulchan Aruch HaRav, the code of Jewish law written by the first Rebbe.

[3][5][6][7][8] "Nothing useful for Divine Service is derived from sadness at all; it only causes one to be inanimate like a stone..." (Siddur Im Dach.