The purpose of this paper identified the influencing factors supplier selection the in purchasing raw-materials of seafood manufacturers by Analytic Hierarchy Process (AHP), as a Multi-Factors Decision Model (MCDM) for analyzing importance weight of supplier selection. The primary factors; product and quality, price, location and distribution channels, service and nineteen secondary factors are considered for selecting specific suppliers. A literature and document review were carried out by using academic database. For determining the importance weight of factor, in-depth interviews of three company managers, who have experience more than 5 years only in purchasing raw-materials for seafood products, were used as the case study. A questionnaire survey was collected to compare each factor for further analysis using AHP technique. The result presented primary factors for supplier selection of each group’s overall importance weight by group relative importance. A quality (0.395), price (0.364), service (0.149), and location and distribution channels (0.092). are the factors influencing the decision to select supplier in Purchasing Raw-Material of Seafood Manufacturers.