The problem of the Irish border remains an important point in the Brexit negotiations with the United Kingdom which rejects the proposal of European Union support, which would create a border in the middle of the Irish Sea.
Speaking at the BBC Andrew Marr Show, Nathalie Loiseau said the ball is on the "London court", adding that only a few weeks were left for negotiations.
Marr pointed out the difficulty of the Prime Minister accepting the support proposed by the European Union.
France's Minister of Europe said: "We need a British response to what we have proposed: the ball is on the court in London and we are waiting."
"It is a matter of weeks until we are sure that we can have a good agreement.
"On the issue of the Irish border, we agreed on London and on the 27th that the situation should be as similar as possible to the current situation. That is to say, without hard borders, without controls between the north and the south of Ireland.
"Therefore, there has to be a solution, but you can not trust the negotiation about the future relationship."
The host of the BBC, Andrew Marr, pointed out the difficulty for the United Kingdom to accept the support proposed by the EU.
He said: "You must understand Nathalie Loiseau, it is very difficult for the British government to accept that a part of the United Kingdom, Northern Ireland, has a different customs and commercial relationship with the EU than the rest of the United Kingdom.
"That's dividing the United Kingdom in half."
The French minister replied: "Well, this is something that should be arranged by London.
"The decision to leave the European Union has been taken by the United Kingdom, not by the 27.
"We have the common knowledge that there has to be an adequate solution for Northern Ireland, for political reasons, reasons related to the peace process and economic reasons."
The Prime Minister has repeatedly rejected the support proposed by the European Union, warning that it threatens the constitutional integrity of the United Kingdom.
At the Brussels summit last week, the Prime Minister suggested that the Brexit transition period could be extended "for a matter of months", but only to ensure that there was no hard border in Ireland if it was impossible to implement the future partnership by the end of 2020.
When asked by Marr if the Brexit transition period would be extended, Brexit secretary Dominic Raab said it could take three months, but Raab said the measure would have to "solve" the problem of Irish support.
He said: "If it is necessary that there be a bridge, I am open mind about the possibility about Using a short extension of the implementation period. Let's say three months. "
Although EU leaders warned that the November summit would be postponed until "decisive progress" in the negotiations is achieved, the Prime Minister left the summit in Brussels last week, optimistic that an agreement.
Speaking to reporters after the summit, Ms. May said: "What I've had from the leaders around the table in the last hours … since I arrived in Brussels yesterday, it's a very real feeling that people he wants the deal made. " And I think if you look at some of the comments that have been made, Chancellor Merkel said that where there is a will there is usually a way. "