Hesder is an Israeli yeshiva program which combines advanced Talmudic studies with military service in the Israel Defense Forces, usually within a Religious Zionist framework. The program allows Orthodox Jewish men to serve in the Israeli military while still engaging in Torah study.

A yeshiva, jeshibah is a traditional Jewish educational institution focused on the study of Rabbinic literature, primarily the Talmud and halacha, while Torah and Jewish philosophy are studied in parallel. The studying is usually done through daily shiurim as well as in study pairs called chavrusas. Chavrusa-style learning is one of the unique features of the yeshiva.