Abstract: In order to study the transfer behaviors of 18 aroma components in breakable capsules to mainstream smoke of cigarettes with filter rods of different characteristics, the influences of filter rod characteristics, including the location and size of breakable capsule, the filter cavity size, and the circumference of cigarette, etc., were analyzed by a GC-MS/MS method. The results showed that: 1) For cigarettes with no ventilation, the closer the breakable capsule location to the tobacco end, the more beneficial to the transfer of aroma components with a boiling point of less than 300 ℃ would be. The transfer rates of the 18 aroma components decreased with the decrease of breakable capsule size, while those of the aroma components with a boiling point less than 300 ℃ increased with the increase of filter rod cavity size. 2) When the breakable capsules of the same size were embedded in cigarettes with different circumferences, the transfer rates of the 18 aroma components increased with the increase of cigarette circumference. 3) The correlation analysis indicated that the distance between the breakable capsule and mouth end of a cigarette, filter rod cavity size, and cigarette circumference highly positively correlated to the transfer rates of the 17 components except for N-ethyl-2-isopropyl-5-methylcyclohexanecarboxamide (WS-3), and the size of a breakable capsule highly or moderately positively correlated with the transfer rates of most of the aroma components. 4) Hierarchical clustering analysis suggested that the transfer behaviors of the aroma components in breakable capsules were closely correlated to their boiling points, molecular weights, volatility, and other physicochemical properties.