The present invention relates to a blood pressure lowering composition which contains as an active ingredient exopolysaccharide produced by means of Ceriporia lacerata, a Ceriporia lacerata mycelium culture medium comprising same, or dry powder or an extract of same. The composition can be used as an antihypertensive for preventing or treating hypertension or cerebral apoplexy or as a functional health food having antihypertensive effect.