A method for producing an L-amino acid is provided. An L-amino acid is produced by culturing a bacterium belonging to the family Enterobacteriaceae and having an L-amino acid-producing ability, wherein the bacterium has been modified so that the activity of aconitase is increased, or the activities of aconitase and acetaldehyde dehydrogenase are increased, in a medium, and collecting the L-amino acid from the medium or cells of the bacterium.