Aljazeera aired a video on Wednesday from the unnamed group, which said it represents the "legitimate Iraqi resistance", showing four armed men standing behind the seated captive, named as Muhammad al-Gharabawi.
The captors said they kidnapped al-Gharabawi because he was collaborating with the US forces in Iraq. He was seized while driving a petrol truck from Saudi Arabia. The group has not made any demands.
The Egyptian embassy in Baghdad says it does not have any information about the driver.
Several Iraqi groups have captured foreigners in recent months and have either released or killed them.
The deadliest group so far is the Jamaat al-Tawhid and Jihad of Abu Musab al-Zarqawi, which has beheaded an American and a South Korean captive.