Nowadays, the usage of influencer marketing on the social media platforms in Thailand is a popular marketing strategy which providing an effective result for promoting tourism industry in Thailand. Many sectors of Thai tourism industry in Thailand such as accommodations, restaurants, and travelling activities have already adopted macro- influencer marketing to increase domestic travelling awareness among Thai people on Instagram platform. However, both public and private sectors involved in domestic tourism industry rarely applied micro-influencer marketing for their product and service endorsement, even though micro-influencer marketing is more cost-effective. This study examines the perspective of Thai Instagram users towards micro-influencer marketing focusing on domestic tourism in Thailand. The surveys were conducted with 100 participants who are Thai active Instagram users to explore their attitude and perception on micro- influencer in terms of engagement, credibility, and reliability that finally affected on their purchasing intention. The finding shows that Thai Instagram users have developed the positive perception towards micro-influencer created contents focusing on travelling lifestyle and domestic tourism. Micro-influencer marketing for Thai tourism industry is able to influence Thai Instagram users when they plan for a vacation, during their vacation, and even after their vacation