Abstract: In order to investigate the influences of cigarette filter design on the release of monomer flavor components in breakable capsules, the effects of capsule location in filter and filter ventilation on the transfer rates and puff-by-puff releases of 40 representative monomer flavor components in mainstream cigarette smoke were analyzed. The results showed that:1) Capsule location in filter and filter ventilation levels significantly affected the transfer rates of the aroma components. The transfer rates of the monomer aroma components were higher when the capsule was planted at 6 mm to the mouth end as compared to those at 18 mm, or when the filter was unventilated. With the increase of the molecular weight of flavor compound, the transfer rate ratios between the capsule planted at 6 mm and that at 18 mm of the same component in alcohol, ketone and ester homologues presented different variation trends. The transfer rate ratios when the filter was unventilated to that of ventilated of the same component in these homologues deceased. 2) The puff-by-puff releases and the puff-by-puff releases per unit TPM of monomer aroma components were higher when the capsule was planted at 6 mm than at 18 mm. The puff-by-puff releases were higher and the puff-by-puff releases per unit TPM were lower when the filter was unventilated than ventilated. 3) The releases of those aroma components with a lower boiling point, such as ethyl hexanoate, ethyl heptanoate, 2-heptanone, 2-octanone and 1-pentanol, increased significantly at the fourth and fifth puffs.