"If she had some courage and a bit of dignity she would say 'I'm resigning because I'm not worthy to carry on as Miss France'," the head of the Miss France committee, Genevieve de Fontenay, told Europe 1 radio.
Valerie Begue, who comes from the French-run, Indian Ocean island of Reunion, was elected Miss France 2008 on prime time television earlier this month. She has ruled out standing down, saying the pictures were published without her consent.
The photos showed the bikini-clad brunette floating in a swimming pool on a wooden cross in a Christ-like pose. Another one showed her licking condensed milk in a provocative fashion.
Anyone standing for the Miss France crown has to sign a contract saying they had never been photographed in the nude or in suggestive poses.