Arsaces I was the first-born son of King Artabanus II of Parthia by a wife whose name is unknown.

[2] After the death of the Roman client king of Armenia, Artaxias III, in 34 AD, Artabanus II decided to put his son on the Armenian throne.

[3] Roman emperor Tiberius, refused to accept Arsaces I as king.

[4] Less than a year into his reign, Arsaces I was poisoned by his servants who had been bribed to kill him.

[5] After Arsaces I died, Artabanus II put another of his sons, Orodes, on the Armenian throne.