Importance of service quality and customer satisfaction has been confirmed significant to increase the whole performance of companies. Retailers and researchers have allowed the relevance of distributing a highly standardized service to customers (Orel, 2015). The quality means a measurement of how well a provided service fulfills the customer's perceptions. If service quality met with the customer expectation, customer will be satisfied. The satisfaction is emotional status and a customer high satisfaction becomes loyal customer further they make repurchasing and deliver positive word-of-mouth advertising for familiar people (Davis & Jaggard, 1990). The purpose of this study is to measure levels of customer satisfaction at a selected pharmacy chain within the Mongolia. The indicator to evaluate the customer's perceptions of customer satisfaction is the SERVQUAL questionnaire. These quality dimensions include tangibles, reliability, responsiveness, assurance and empathy.