With the trend of developing slow tourism in the global tourism industry, this study aims to examine the role of memory impressions in slow tourism. Building upon the theoretical support of authenticity, this study proposes an authenticity‐driven model for memory impressions in slow tourism. Data were collected from 303 foreign tourists who have been to three slow towns in Taiwan, including Chishang, Nanzhuang, and Chaozhou. Analytical results show that, in slow tourism, intrapersonal authenticity enhances interpersonal authenticity. Intrapersonal and interpersonal authenticity both improve memory impressions. Destination satisfaction and destination loyalty are significant outcomes of memory impressions. In addition, we found that memory impressions could mediate the relationship between intrapersonal, and interpersonal authenticity, satisfaction, and destination loyalty. To the best of our knowledge, this is one of the first attempts to contribute knowledge of memory impressions in slow tourism.