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Background: In Indonesia, seaweed has a very important role in improving the welfare of coastal communities. As a source of nutrition, seaweed consist of carbohydrate, protein, fat, fiber and ash, vitamin, and beta-carotene. Good drying methods is needed to preserve the quality of dried seaweed. Aims: The aim of this study is to determine the trend of weight reduce during seaweed drying using natural and cabinet drying Materials and Methods: The method used is experimental in field and laboratory. The result of the study were analyzed using simple linear regression to formulate a trend of reducing weight seaweed while drying Results: The result showed that the weight reduce seaweed by natural method can be illustrated by the regression linear equation Y = -2,3853X + 943,65 with R2 = 0,9859 which mean a reduce seaweed i.e. 2,3853 gram per minutes during 6 hour. While the weight reduce seaweed by cabinet dryer method can be illustrated by the regression linear equation Y = Y = -0,8588X + 913,55 with R2 = 0,9315 which mean a reduce seaweed i.e. 0,8588 gram per minutes during 6 hour. Conclusion: Reduction of seaweed weight per minute by natural drying method is higher than cabinet drying method, but cabinet drying method is more stable because does not depend on the weather while drying process.