The detrimental effect of Visual Pollution of Poster in Bangkok Metropolis has worsened the quality of human life as those from other environmental pollutions. However, so far there has been no obvious evidence to show the damage of the visual pollution caused by posters. The researcher, therefore, made a study on the characteristics, sizes, volumes, installations and enviromental conditions where posters were put up in Bangkok Metropolis. In doing this, the following factors of samples were taken into account for example the relationship of gender, age, occupation, educational level types of residence and the duration of residence in Bangkok together with their attitudes towards the poster installation. The sample groups of the population under study consisted of 120 persons in 3 shopping centers. The tools of the research were questionairs whose results were evaluated by computer. The statistics techniques used were percentage, average and chi-square. The results of the studies indicated that the majority of the sample groups of the opinion that posters in Bangkok Metropolis were colorful, full of pictures and were of large sizes. More and more posters were put up in space area and public locations than of before. The disapproval of the sample groups towards the characteristics, sizes, quantities, installations and environmental conditions of Bangkok posters was of moderate level. Where as that indicated by difference in gender, age, occupation, educational level, types and duration of residence in Bangkok amounted to .05 of insignificant importance.