Disclosed is a novel promoter capable of increasing the synthesis of plant oils and fats via genetic manipulation. Said promoter is obtained by binding a first nucleic acid, which has a continuous sequence of at least 500 bases from within the 1000 bases upstream from the translation initiation site of a gene selected from the group consisting of FAE1 and FAD3, and a second nucleic acid, which includes at least one WRI1 binding sequence and has a continuous sequence of at least 100 bases from within the 5 upstream untranslated region of a gene selected from the group consisting of BCCP1, BCCP2, CTa and BC.
