Michael V Kalaphates (Ancient Greek: Μιχαήλ Καλαφάτης, Michaḗl Kalaphátēs) was Byzantine emperor for four months in 1041–1042.

Although the emperor preferred another of his nephews, the future Michael V was advanced as heir to the throne by his other uncle John the Orphanotrophos and the Empress Zoe.

[7] Determined to rule on his own, Michael V came into conflict with his uncle John the Orphanotrophos, whom he almost immediately banished to a monastery.

His announcement of the event in the morning led to a popular revolt; the palace was surrounded by a mob demanding Zoe's immediate restoration.

[11] Although he had taken monastic vows, Michael was arrested, blinded[5][12] and sent to a monastery by then-Chief of the Varangian Guard, Harald Hardrada.