Indonesia has become the biggest market for e-commerce, as it has 250 million inhabitants. Growth of internet and online shopping has made retailers expand their business via smartphone. Shopping channel via internet has given customer another channel to get the information and buy products without visiting brickand-mortar store. This channel multiplicity potentially leads customer to do showrooming. In this research, showrooming in Indonesia will be explored with sunglasses as research object and optic salesperson as research subject. There are 178 samples collected in total for the research which 154 of them can be used. Primary data is taken from optic salesperson at prominent optics store in Jakarta. Partial Least Square (PLS) is used as data analysis method. The research results show that perceived showrooming behavior has positive and significant effect on self-efficacy dan salesperson performance. Moreover, salesperson selfefficacy also has positive and significant effect on salesperson performance. Meanwhile, coping and crossselling strategies have moderate positive but not significant effect. These results reflect that salesperson do not response negatively to customer's showrooming behavior such as price comparison, window shopping, product information, product availability, shopping via smartphone in front of salesperson. Salesperson feel optimistic and confident when customer comes because they have been trained for customer orientation, availability of supervisory support, and belief that customer will do transaction in brick-and-mortar stores if they give good explanation about the product.