An ephod was a type of apron that, according to the Hebrew Bible, was worn by the High Priest of Israel, an artifact and an object to be revered in ancient Israelite culture, and was closely connected with oracular practices and priestly ritual.

In Judaism, the High Priest of Israel was the head of the Israelite priesthood. He played a unique role in the worship conducted in the Tabernacle and later in the Temple in Jerusalem, as well as in some non-ritual matters. Like all priests, he was required to be descended from Aaron. But unlike other priests, the high priest followed more restrictive laws, wore unique priestly garments, and was the only priest allowed to perform certain ceremonies.