Gedaliah Nadel (Hebrew: הרב גדליה נדל‎; (1923–2004) was an influential rabbi in Israel's Haredi community, and a close disciple of the Chazon Ish.

[2] Rabbi Reuven Trop visited the settlement and suggested that Nadel’s father send him to Heichal HaTorah Yeshiva in Tel Aviv.

There, under the influence of Rabbi Yehoshua Yagel, he grew close to the Chazon Ish, visiting him weekly on Fridays to discuss learning.

After his marriage, Nadel lived in Jerusalem, close to his father-in-law, and developed connections with Rabbi Shimshon Aharon Polonsky and the Brisker Rav.

Later, he moved to Bnei Brak and served as a teacher at Yeshivat Beit Yisrael v'Damasek Eliezer, affiliated with Vizhnitz Hasidism.

The incident, involving an unauthorized autopsy by the Sheba Medical Center, led to widespread protests in Bnei Brak against post-mortem examinations, resulting in the establishment of a government commission of inquiry.

His children and many of his grandchildren followed his approach of avoiding reliance on Torah study stipends and instead entered trades such as retail, construction, and matzah baking.

His eldest son, Rabbi Yosef Shmuel Nadel, is the Rosh Kollel of "Ohel Yaakov" and a dayan in Modi'in Illit.

After his death, Rabbi Yitzchak Sheilat published BeTorato Shel R’ Gedalia with complete transcriptions of his teachings.

B'Torato Shel Rav Gedaliah was banned by three prominent Bnei Barak rabbis because it supported Darwin's theory of evolution, including sentences such as: "Regarding [the idea that] the creation of man in the image of God marked the end of a long process which started with a non-cognizant animal which gradually evolved until this creature was given a human mind... this is an accurate description.

"[14]B'Torato Shel Rav Gedaliah is a compilation of teachings prepared, which, according to the book, is taken from Nadel's audio recordings and published at his request.