Recently, people\'s interest in particulate matter (PM) has been increasing, due to its hazardous health effects. The purpose of this study was to investigate the concentrations and as well as the inhaled weight of PM, correlated with person’s heart rate in subway, bus, vehicle and bicycle in the major public transportation (Sadang - Jamsil and Nowon – Dongdaemun) in Seoul. The concentration of PM10 and PM2.5 were measured from each of transportation means and calculated the average concentrations which were 87.2 and 57.8 μg/m3 for subway, 62.8 and 42.5 μg/m3 for vehicle, 61.5 and 36.8 μg/m3 for bus and 53.0 and 29.4 μg/m3 for bicycle in PM10 and PM2.5 respectively. Inhalation dose for PM10 and PM2.5 were estimated at 248.1 and 139.4 μg for bicycle, 56.7 and 39.3 μg for vehicle, 49.4 and 29.9 μg for bus and 44.3 and 29.1 μg for subway, respectively. Even though subway had the highest concentration, the highest inhalation dose was the bicycle. It was due to the long travel time-exposure and breathing rate which leads to maximum of PM10 5.6 and PM2.5 with 4.8 times inhalation dose comparing with other modes of transportation. With regards to future studies, the amount of inhalation in each transportation means should be considered in risk assessments of PM.