|placeofbirth= Durango, Vizcaya|placeofdeath=|allegiance=Euskadi Ta Askatasuna (ETA)|branch=|serviceyears= 2002-present|rank= Head of the military commandos|unit=|commands=|battles=|awards=|relations=|laterwork=}}Jurdan Martitegi Lizaso
(born May 10, 1980) is an Euskadi Ta Askatasuna member. He is believed by police to be the current head the military/commando unit of the group.
He gained prominent in the military section of ETA leading the comando Vizcaya after the 2006 cesasfire along with "Arkaitz Goikoetxea" and rose to the highest level of ETA's military leadership following the December 2008 arrest of "Aitzol Iriondo Yarza" alias Gurbita
who had replaced Miguel de Garikoitz Aspiazu Rubina
, arrested less than a month before.
Before joining ETA, Jurdan Martitegi had a wide record of kale borroka acts. On February 12, 1998 he presented himself in front of Baltazar Garzón, after being accused of several street violence acts during 1997.
He was shortly released but later accused of taking part in a molotov attack against a Ertzaintza police station in Amorebieta. In 2000 he was arrested after attacking a concessionaire in Iurreta and a bank and Guardia Civil barracks in Galdakao, in which a policeman was wounded.
He was arrested again on March 5, 2001 after placing an explosive at the Durango courts and spent some time at the Alcalá Meco and Daroca prisions.
In early 2009 Spanish police announced that ETA had restrctured its commandos and that Martitegi would be leading them along with his lieutenant "Andoni Sarasola" and ETA member "Iurgi Mendinueta".
Since his work as a military chief ETA has already carried several attacks (see List of ETA attacks in 2009), including a van bomb in Madrid on February 8, 2009 which led police to think that ETA has established its first cell in Madrid for about six years.