મહાભારતમાં '''ધૃષ્ટદ્યુમ્ન'''(સંકૃતઃ धृष्टद्युम्न), [[દ્રૌપદી]]નો ભાઇ તથા પાંચાલ નરેશ [[દ્રુપદ]]નો પુત્ર હતો. તેનો જન્મ [[દ્રોણ]] ને મારવા માટે થયો હતો.
દ્રુપદ પણ પ્રતિશોધની અગ્નિથી પિડાવા લાગ્યા અને તેમણે દ્રોણને મારી શકે તેવા પુત્રની પ્રાપ્તિ માટે યજ્ઞ કર્યો. યજ્ઞ માથી તેમને પુત્ર પ્રાપ્ત થયો જેનું નામ '''ધૃષ્ટદ્યુમ્ન''' રાખવામાં આવ્યું અને જે પુત્રિ પ્રાપ્ત થઇ તેનુ નામ [[દ્રૌપદી]] પાડવામા આવ્યું. ધૃષ્ટદ્યુમ્નએ મહાભારતના યુદ્ધમાં દ્રોણનો છલથી વધ કર્યો હતો.
Even though he is the prophesied killer of Drona, he is accepted by Drona to join his school for young princes, where he learns the advanced military arts.
When his sister is bethrothed to a young [[brahmin]] of five, who wins the martial contest at her [[swayamvara]], Dhristadyumna secretly follows the five brahmins and his sister, only to discover that they are in fact the five Pandavas: [[Yudhisthira]], [[Bhima]], [[Arjuna]], [[Nakula]] and [[Sahadeva]].
Taking the advice of Lord [[Krishna]] and [[Arjuna]], Dhristadyumna is installed as the Commander in Chief of the Pandava Army.
At a point when Drona, as the Kuru commander is killing vast numbers of Pandava troops, Krishna advises Yudhisthira to adopt a plan to kill the preceptor now. As it is known that as long as Drona has raised his weapons he is invincible to all other warriors, Krishna advises that it be proclaimed that Drona's son, [[Ashwathama]] has just died in the battle. It is known that out of the grief of such an eventuality, Drona will at least temporarily drop his arms.
Krishna justifies this lie to Yudhisthira as necessary to the victory of morality in the war. As Yudhisthira continues to hesitate, his brother [[Bhima]] kills a known elephant in the Kuru legions named Ashwathama and celebrates shouting ''"Ashwathama is dead! Ashwathama is dead!"''.
Shocked with disbelief when the news reaches him, Drona seeks out Yudhisthira to ascertain the news, knowing that the son of [[Dharma]] would never speak a lie. Yudhisthira tells him that Ashwathama is dead, but mutters "(I wonder) whether the man or the elephant...." ( ''Aswathama Hatah... <small>naro waa Kunjarovaa</small>'')in an inaudible voice to prevent telling a whole lie or as another version tells us that he said it equally loud but Shri [[Krishna]] had planned to blow his conch at that exact moment so that Drona is unable to hear that part.
Now convinced, Drona lays down his arms and sits in meditation. It is actually said in the epic that Drona's soul has already left his body through his mediation, but Dhristadyumna takes this opportunity, swings onto Drona's chariot, and lops off his head.
Dhristadyumna is verbally abused by Satyaki and [[Arjuna]], who were devoted students of Drona, but is defended by Krishna.
After the war is over, [[Ashwathama]] treacherously attacks the Pandava camp during the night, killing Dhristadyumna and the sons of Draupadi in revenge for his father's death and the defeat of the Kurus.