By Francois Murphy

PARIS (Reuters) - French Foreign Minister Bernard Kouchner said on Monday countries on the U.N. Security Council that did not agree to pressure Myanmar into opening its doors to foreign aid were guilty of "cowardice".

France has tried unsuccessfully to convince the Council that Myanmar's military rulers should let aid reach the victims of Cyclone Nargis under a "responsibility to protect" principle recognized in a 2005 U.N. resolution.

China, Russia, Vietnam and South Africa have opposed Council involvement in what they say is a humanitarian, not a political issue.

"We denounce the impending death of thousands more civilians, and we are accused of meddling in the internal affairs of a sovereign state," Kouchner, who founded medical charity Medecins Sans Frontieres, said in an opinion piece in newspaper Le Monde.

Kouchner recognized the concept of a "responsibility to protect" was only passed by the United Nations with armed conflicts in mind, and therefore did not apply to Myanmar, where the cyclone hit two weeks ago, leaving 134,000 dead and missing.

Instead he cited a 1988 resolution which states that leaving the victims of natural disasters without humanitarian assistance "constitutes a threat to human life and an offence to human dignity" and invites states in need of help to facilitate the work of aid groups.