Expressed and integrated methods of peptide in plants

The present invention relates to a method of expressing and accumulation of low molecular weight peptides in seeds of a plant, the vector therefor, and a plant transformed with the vector. That is, under a promoter dominate, the plants with the fusion protein expression vector comprising a gene encoding a target peptide consisting of 2 or more copies of 3 to 40 amino acid residues linked to the downstream of the gene and the gene encoding the glutelin family by transformation, expression, to integrate the peptide to the seed.