The present invention describes the production of L-tyrosine by culturing in a medium an Escherichia bacterium which has L-tyrosine-producing ability and which carries a mutant prephenate dehydrogenase which is desensitized to feedback inhibition by L-tyrosine, producing and accumulating L-tyrosine in the medium or in the bacterial cells, and collecting L-tyrosine from the medium or the bacterial cells.