This study aims to examine the factors affecting the use of Social Networking Services (SNS) among
Korean adults. For this purpose, this study classified the respondents into non-user group, moderate user
group, and active user group depending on the degree of SNS use. Based on 385 reponses from men and
women in their 30's to 50's, this study found several interesting findings. Especially, the hierarchical logistic
regression anlaysis revealed that perceived usefulness and perceived ease of use are the variables which
predict whether or not people use SNS, and how actively those users use SNS, confirming that
Technological Acceptance Moden (TAM) may explain in part the process of SNS acceptance among Korean
adults.