Recently many companies have paid attention to jaycustomers’ behaviors and coped with them. It is important to pay attention to jaycustomers’ behaviors because those behaviors affect the average customers in negative way. In order to understand the impact of jaycustomers’ behaviors on firms, this research investigated jaycustomers’ behavior, the impact of their behavior on general customers, and the interaction of the observer’s gender. According to our hypothesis, we predicted that the attitude toward the firm would differ according to the observer’s gender, the male customer would not be affected by jaycustomers’ behavior while female customer would be affected by jaycustomers’ behavior and would have less favorable attitude toward the firm when they were disturbed by jaycustomers’ behavior. The hypotheses were tested on the base of experiment via scenarios. As a result, male customers did not show different responses regarding jaycustomers’ behavior and the extent of affliction on them between control conditions. On the contrary, female customers showed lower attitude toward the company when they saw jaycustomers and were disturbed by them. Moreover, for female consumers, empathy toward jaycustomers played a mediating role in the relationship between the impact of jaycustomers’ behaviors on company attitude. This research gives useful informations in dealing with jaycustomers’ behaviors. That is, since the jaycustomers disturb and give negative impact to general consumers, it is important to focus on the reaction of general consumers. Especially, service companies not only have to concern on dealing with jaycustomers but also have to concern on dealing with general consumers observing jaycustomers’ behavior.