Organic fertilizer production with the use of coconut fiber to improve the quality of organic fertilizer has been done. This study aims to determine the increase in the quality of organic fertilizer pulp by utilizing coconut fibers in increasing the porosity of raw materials. Utilizing combination EM4 bioindicator and Starbio bioindicator to improve the process of decomposition of organic matter are applied in this research. This research use experiment method by comparing the quality of the fertilizer from tofu dregs only with the quality of the fertilizer tofu dregs that is adding by massa variations of coconut fibers. Bioindikator combination of EM4 and starbio also studied in this research. The result of this research showed that by using 7.5 grams of coconut fibers can increase the organic matter decomposition process. Combination of EM4 bioindicator and Stabio bioindicator also can increase decomposition process so the percentage of organic material in the organic fertilizer are on the threshold by SNI, namely 54,72%.Kata Kunci: ampas tahu, fermentasi, pupuk, serabut kelapa