The family of Ibrahim Halawa are boarding a flight to Brussels this morning to plead with MEPs for their help.
Ibrahim has been held in an Egyptian jail since his arrest at a protest in Cairo in 2013.
The Dublin teenager's ninth scheduled court appearance was called off earlier this month when two of the defendants failed to appear at the mass trial.
Sinn Féin MEP Lynn Boylan, who is joining the Halawa family in Brussels, says the issue needs to be raised at a European level.
Ms Boylan said: "The family are losing faith in the process, they are increasingly frustrated so what I am hoping to do is raise it on the European level, because Ibrahim Halawa being an Irish citizen also makes him a citizen of the European Union.
"There are lots of MEPS who I am sure are not aware of the fact that Ibrahim Halawa is the only EU citizen who is a political prisoner in an Egyptian prison."