Background: In recent years, the increase in numbers of motor vehicle, especially in urban area, has contributed the decrease of air environment quality. Urban air pollution due to motor vehicle is able to effect to people's health who live beside main traffic-ways and crossroads in urban areas. Objectives: To evaluate urban air pollution level due to motor vehicle in inner Hanoi city and investigate to the real situation of people's health who have high risk from effect of air pollution due to motor vehicle. Method: Descriptive and cross-section study were used Results: This study was carried out in hot and cold seasons.