"This decision completely contradicts the court's ruling," Hamas spokesman Fawzi Barhum told AFP.
"It is unjust and wrong to our people and legitimate resistance, and also encourages the occupation to continue its crimes," he added, referring to Israel.
"We reject this decision and call for its review, and to remove all forms of injustice against our people and Hamas," Barhum declared.
Brussels has lodged an appeal against a December ruling by the bloc's second highest court that Hamas should be removed from the list for the first time since 2001 - a ruling made the same day the European Parliament overwhelmingly voted “in principle” to recognize Palestinian Arab statehood as an outcome of peace talks.
A spokeswoman for the European Council said on Friday Hamas would stay "on list" during the council's appeal process, which is expected to take around a year and a half.
Hamas's so-called “military wing” was added to the EU's first-ever terrorism blacklist drawn up in December 2001 in the wake of the September 11 attacks on the United States.
The EU then blacklisted the political wing of Hamas in 2003, but the General Court of the European Union ruled last year that the Hamas blacklisting was based not on sound legal judgments but on conclusions derived from the media and the Internet.
(Arutz Sheva’s North American desk is keeping you updated until the start of Shabbat in New York. The time posted automatically on all Arutz Sheva articles, however, is Israeli time.)