库思老二世（570年？－628年2月28日），人称“得胜王”（Parvez），《旧唐书》作库萨和，埃兰沙赫尔第22代君主，590年至628年在位。

库思老二世被其父贺尔米斯达四世的反叛者拥立继位，即位后将其父施以盲刑，后又处死。但名将巴赫拉姆·楚宾此时自立为王，不承认库思老的王位，库思老被迫逃往东罗马帝国，在皇帝莫里斯的出兵援助下，回国击败巴赫拉姆·楚宾。库思老一嗣权位稳固，便立即同东罗马帝国断绝关系，致使莫里斯未能实现其臣服埃兰沙赫尔的理想。

602年，莫里斯被谋杀，东罗马帝国内乱，库思老乘机率军进攻东罗马帝国，一度占领原属于东罗马帝国的小亚细亚大部分。到了615年，巴勒斯坦、叙利亚、耶路撒冷和美索不达米亚相继被征服。621年埃及被占领。已威逼拜占庭（东罗马）国都君士坦丁堡。在也门，库思老二世也有所征服。对拜占庭帝国继续实行进攻，联合阿瓦尔人一起进攻君士坦丁堡。在危急时刻，东罗马政府也考虑过迁都迦太基。结果，库思老二世和阿瓦尔人联军被东罗马军队打败，被迫撤退。此后，波斯军开始屡战屡败。

Khosrow II (Chosroes II in classical sources; Middle Persian: Husrō(y)), entitled "Aparvēz" ("The Victorious"), also Khusraw Parvēz (New Persian: خسرو پرویز), was the last great king of the Sasanian Empire, reigning from 590 to 628. He was the son of Hormizd IV (reigned 579–590) and the grandson of Khosrow I (reigned 531–579). He was the last king of Persia to have a lengthy reign before the Muslim conquest of Iran, which began five years after his death by execution. He lost his throne, then recovered it with Roman help, and, a decade later, went on to emulate the feats of the Achaemenids, conquering the rich Roman provinces of the Middle East; much of his reign was spent in wars with the Byzantine Empire and struggling against usurpers such as Bahram Chobin and Vistahm.