Involvement is an important construct in Consumer Behavior, but most of its applications focus on product or advertising involvement and seldom appears in service literature. Therefore, based on the differences of characteristics between service and physical products, we developed a measurement, Service Involvement Inventory (SII) that is constituted by interactivity, perceived control, importance, perceived risk, and interesting dimensions. The development of SII followed the paradigm of measurement and its empirical result has high reliability, validity and more predictability than Zaichkowsky's (1985) PII.