Claudio Brook as Simón

Silvia Pinal as The Devil

Hortensia Santoveña as The Mother

Enrique Álvarez Félix as Brother Matías

Francisco Reiguera as The Devil as an Old Witch

Luis Aceves Castañeda as Priest

Antonio Bravo as Priest

Enrique del Castillo as The Mutilated One

Enrique García Álvarez as Hermano Zenón/Old monk

Eduardo MacGregor as Hermano Daniel/Monk

Glauber Rocha as Man in nightclub (uncredited)

Ricardo Adalid as Monk (uncredited)

Victorio Blanco as Monje viejo/Old monk (uncredited)

Jesús Fernández as Dwarf Goatherd (uncredited)

Nathanael León as Monk (uncredited)

Rubén Márquez as Monk (uncredited)

Ángel Merino as Rich man (uncredited)