P T. Lantana Makmur is a company engaged in the condensate distribution servicewhich is a chemical liquid used as a raw material for making paint and thinner. In thedistribution process, there are often many problems that should be minimized orimproved especially in the service sector. The purpose of this research is to give theimprovement suggestions for the distribution service quality of the Santos Condensatein PT. Lantana Makmur. The methods used in order to improve the distribution servicequality is Service Quality and Six Sigma method. In the Service Quality the surveywill be done on the customer satisfaction and expectations through a questionnaire.The Service Quality will calculate the gap and the value of service quality (Q) toobtain attributes or problem happened in the distribution service. In the Six Sigma theapproach of Define, Measure, Analyze, Improve, Control (DMAIC) will be used inorder to solve the problem and identify the improvement suggestions of distributionservice quality. The result of this research is the improvement suggestion ofdistribution service quality in the Capital or Money aspect which is to clean the storagedrum using a drum rust cleaner liquid and to switch or change the storage drum inphases into an anti rust storage drum such as a storage drum with an anti rust coating.The Service Quality value obtained is about 0,875377 also the DPMO and sigmabefore the improvement suggestions is 250667 and 2,25. The improvement suggestionis experimented by the questionnaire in the Control step and the worthiness scoregained for each improvement suggestions based on the questionnaire at the Controlstage is 4,57 and 4,71 so that both of the improvement suggestions is worth and alsocan improve the sigma and service quality.