Γεννήθηκε στη κατεχόμενη Άσσια το 1931, είναι ο νεότερος γιος του Λαϊκού Ζωγράφου Μιχαήλ Χρ. Κάσιαλου.  Με τη ζωγραφική άρχισε να ασχολείται μετά το 1967 παρακολουθώντας από μικρός την καλλιτεχνική δραστηριότητα του πατέρα του και συνοδεύοντας αυτόν στις διάφορες εκθέσεις του.

Kyriakos Mih. Kassialos was born in the occupied Assia in 1931. He is the youngest son of the naive painter Michail Hr. Kassialos. He graduated from the primary school of his village and dealt with various professions (Carpenter, Clearing Agent, Ceramist).

He began to paint in 1967 after watching the artistic activity of his father and accompanying him in his various exhibitions. He has also taken part in many group-exhibitions. His work can be found in private collections, in the Pieridis Institution, the Ethnographic Museum of Avgorou, the Pieridis Art gallery in Athens etc.