The sample size for this research is set to 300 primary research respondents in order to provide a set of respondents that are representative of the total population of Bangkok, Thailand to consider the factors that influence buying behaviour towards organic food products. However, due to the limitation of cost and time, this research is using the online questionnaire service namely “surveymonkey.com”, whereby the questionnaire will be uploaded to this website and then wait for the respondents to access and provide their responses. Moreover, to provide a convenient channel for the respondents to access and respond to the questionnaire, Facebook and E-mail have been chosen to be the main and secondary communication channels by sequent.