This study aims to determine the effect of the influence of advertising messages, consumer trust and consumer attitudes towards the purchase decisions services and consumer loyalty in using Pertamina Hospital services in Balikpapan. Data analysis tools used in this study are Partial Least Square (PLS) with the help of SmartPLS 3.0 software The results of this study indicate: (1) Advertising messages have a positive and significant effect on consumer decisions, (2) Advertising messages has a positive and significant effect on Customer Loyalty, (3) Consumer Trust has a positive and significant effect on Purchase decisions, (4) Customer Trust has a positive and significant effect on Customer Loyalty, (5) Consumer Attitude has a negative and insignificant effect on Purchase decisions Services, (6) Consumer Attitude has a positive and significant influence on Customer Loyalty, (7) Decision on Using RSPB Services gives positive and significant influence on Customer loyalty.
                        
                        
                        
                        
                            
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