The present invention provides a substance which can modulate expression of a Bmal gene effectively and with a wide range of application. Provided is an expression modulator for the Bmal gene comprising, as an active ingredient, one or more selected from the group consisting of hinoki cypress extract, chlorella extract, hop extract, Zanthoxylum extract, juniper oil, lavender oil, eucalyptus oil, olibanum, cypress oil, palmarosa oil, pineneedle oil, rose oil, ylang-ylang oil, elemi oil, petitgrain oil, pepper oil, thyme oil and chamomile oil.
