The purpose of this study was to summarize empirical evidence regarding factors influencing adherence to preventive behaviors of Thais with hypertension. An electronic search was performed using PubMed, Medline, CINAHL, SCOPUS, ThaiJo, and ThaiLis databases to identify studies that examined the factors which influenced adherence to preventive behaviors in Thai adults with hypertension. We identified research studies published between 1995 and 2017, which were assessed by 2 independent reviewers. Fourteen publications were included; 3 of these were qualitative studies. Social support, knowledge of hypertension, perception of illness, perceived benefits, perceived barrier, perceived self-efficacy, Thai cultural values, and patient-provider communication were identified as factors influencing adherence to preventive behaviors of Thai adults with hypertension. Although information about factors influencing adherence is growing, more research is needed on how to provide the best intervention support for this challenging task.