The parliament's procedures for dealing with allegations of unwanted sexual advances have come under scrutiny this week amid increasing talk of harassment within the EU, including so-far anonymous reports of rape and abuse of power among parliamentary staff.
MEPs passed a resolution calling on the parliament's chief and administration to "urgently and thoroughly examine the recent media reports on sexual harassment and abuse in the European Parliament".
They said the parliament should "set up a task force of independent experts... to examine the situation of sexual harassment and abuse in parliament" and suggest any necessary changes to the existing complaints procedure.
It said that "all too often" such assistants are afraid to speak out as a special "loss of trust" clause in their contracts means they can be sacked at very short notice.
A spokeswoman for the European Parliament has said that cases of rape and sexual harassment have been reported, and "sanctions and disciplinary measures" have been taken, but these did not involve MEPs or their assistants.
"In the European Parliament there is not more harassment than elsewhere, but nor is there less," French socialist MEP Edouard Martin said.