Trishira (Sanskrit: त्रिशिर, IAST: triśira, lit. he who has three heads) was a Rakshasa (a demon), and reference to him is found in the Ramayana. He was one of the son of Ravana and Dhanyamalini and his brothers are Atikaya, Narantaka and Devantaka.
The Ramayana tells that he engaged Hanuman in a fight and hit him with a number of arrows. At this Hanuman told him that the arrows were nothing but like flowers being showered on his body. Thereafter, a duel ensued, in which Hanuman killed Trishira.