The present invention is related to oligonucleotides for the specific identification of Staphylococci species which nucleotide sequence has between 15 and 350 base pairs, preferably between 15 and 45 base pairs, obtained from the 'consensus' femA nucleotide sequence (CNS) of the figure or its complementary strand. The present invention is also related to a method and a diagnostic device using said oligonucleotide for the identification of various types of Staphylococci species strains.