This study investigates factors that affect user acceptance of omnichannel services using the unified theory of acceptance and use of technology (UTAUT), a model that has been supported by previous studies on innovative technology and services, such as online web and multichannel. The results of the study show that the main variables of UTAUT: performance expectancy, facilitating conditions, social influence, and effort expectancy, all had positive influence on acceptance of omnichannel services, facilitating conditions being the biggest influencer among them. Pleasure from shopping and perceived risks were also added to the list of variables of customer intent, and were also shown to exert significant influence on user acceptance. It was also found that customers with different genders, usage experience, and purchase amounts were affected by these variables in varying degrees. We hope the results of this study can offer meaningful guidance for the expansion of the growing omnichannel market and its successful market entry, and serve as a foundation for fundamental research on this topic by identifying the needs of omnichannel customers and appropriate strategies.