Nowadays social media is widely used every industry and it is affected hospitality and tourism industry too. The electronic word-of-mouth (eWOM) is one of the information source that consumers will read before they make an online booking. The main purpose of this study is to investigate international tourist's attitude toward product placement and attitude toward electronic word-of-mouth (eWOM) and consumer perceived trust and perceived risk on Mongolian online travel agency booking. Recent years a lot of foreigners coming to Mongolia and tourism industry is expand very fast and market continued constantly growing and the consumer has more chance to access to the product very easily. Online questionnaire were posted on Google form from September 12th, 2016. The study of pilot test is tested valid based on analysis with 100 samples and the final test is tested significant based analysis with 424 samples with descriptive and factor analysis, reliability test, simple linear regression were used for data analysis. For future researchers, it is suggested to involve Mongolian local consumers in the survey and include more variables to broaden the study.
