Mar Abdisho IV Maron (Classical Syriac: ܥܒܕܝܫܘܥ ܪܒܝܥܝܐ ܡܪܘܢ) was the second Patriarch of the Chaldean Catholic Church, from 1555 to 1570.

Abdisho, whose name is spelled in many different ways in Latin characters (Abdisu, Abd-Jesu, Hebed-Jesu, Abdissi, Audishu) meaning Servant of Jesus, was born in Gazarta on the River Tigris, son of Yohannan of the house of Mari.

[1] In a letter of his dated 1562 to the pope he listed thirty-eight dioceses under his rule, ranging from the Ottoman Empire to Persia and India.

Modern scholars suggest that the actual dioceses could be only about fourteen, and the error in the list was due to a probable mistake in translation from Syriac to Latin.

[4] About his reign, we know that in 1565 the pope confirmed the use of the traditional Chaldean uses and rites,[5] and that he moved the See from Amid to the monastery of Mar Yaqub Khbhisha near Siirt.