Grand Ayatollah Yasubeddin Rastegar Jooybari (Persian: يعسوب الدين رستگار جويباري) (born 1940) is an Iranian Twelver Shi'a Marja'. He has studied in seminaries of Qom, Iran under Grand Ayatollah Mohammad Kazem Shariatmadari, Mohammad-Reza Golpaygani and Mirza Hashem Amoli. He has repeatedly been arrested for his opposition against the current Iranian government, in particular Supreme Leader Khamenei. Khamenei's elevation to supreme leader was challenged by him.