The purpose of the study is to investigate the perceived service quality of the airlines among employees of the travel agencies, mangers of the airlines and other employees of the airlines. The major results arc as follows: 1. Some service quality factors had higher perception importance in employees and managers of airlines as well as in employees of travel agencies. 2. Employees of the travel agencies had higher perceived importance scores in incident handling, flight planning, service on plane, and transaction support than managers or employees of the airlines had but their satisfaction was lower. 3. The factor analysis found seven service quality factors and there indeed existed significant differences in perceived importance and satisfaction of some factors among employees in travel agencies, managers in airlines and other employees in airlines. 4. The airlines frequently collect the information about the needs or expectation of the travel agencies directly or indirectly. However, they should shorten the number of hierarchy when the first line workers try to communicate with the higher mangers. 5. The airlines thought their service quality and management were ok and the role of the employees in service quality was ok too. 6. The employees of the travel agencies had negative evaluation to all service quality factors of the airlines.