This study investigates the antecedents of the complaining behaviors and complaint responses of the library and information center users based on the theoretical backgrounds and suggests eight propositions and conceptual model for the library and information center. It examines as the antecedents, satisfaction/dissatisfaction, attitude toward complaining, likelihood of success, materials/facilities/service importance, attribution, loyalty, and justices; and as complaint responses. exit, voice(redress seeking), negative word-of-mouth, and third party complaints.