A mutant carotenoidogenic bacterium, comprising any of genes (a)-(c) below: (a) a gene encoding a protein comprising a mutant amino acid sequence in which at least the 225th amino acid residue in the amino acid sequence of 1-deoxy-D-xylulose 5-phosphate synthase of a carotenoidogenic bacterium has been substituted with other amino acid residue; (b) a gene encoding a protein comprising a mutant amino acid sequence in which at least the 305th amino acid residue in the amino acid sequence of decaprenyl diphosphate synthase of a carotenoidogenic bacterium has been substituted with other amino acid residue; and (c) both of the genes (a) and (b) above.

A mutant carotenoidogenic bacterium, comprising any of genes (a)-(c) below: (a) a gene encoding a protein comprising a mutant amino acid sequence in which at least the 225th amino acid residue in the amino acid sequence of 1-deoxy-D-xylulose 5-phosphate synthase of a carotenoidogenic bacterium has been substituted with other amino acid residue; (b) a gene encoding a protein comprising a mutant amino acid sequence in which at least the 305th amino acid residue in the amino acid sequence of decaprenyl diphosphate synthase of a carotenoidogenic bacterium has been substituted with other amino acid residue; and (c) both of the genes (a) and (b) above.