The research aims to examine the effect of the use of seaweed in rabbit feed pellets on the level of hardness, durability and organoleptic pellets. The materials used are Sargassum sp. Flour, yellow corn flour, pollard, soybean meal, wheat brand, rice bran, coffee husk, coconut cake, molasses, minerals and salt. The study used a completely randomized design (CRD) with 3 treatments namely T0 = feed with Sargassum sp. 0%, T1 = feed with Sargassum sp. 4% and T2 = feed with Sargassum sp. 8% and 6 replications. The parameters observed were level of hardness, durability, color, texture and pellet aroma. Data analysis used analysis of variance at the 5% level and continued with duncan double region test. The results showed that the use of Sargassum sp. significant effect (P <0.05) reduced the hardness, color, texture, and aroma scores, but did not significantly affect the durability of rabbit feed pellets. The average hardness of treatments T0, T1 and T2 are 13.50; 12,13 and 11,17 kg, the average durability of the treatments T0, T1 and T2 are 94.88; 95.13 and 95.38%, the average color score of the treatments T0, T2, and T1 are 4.00; 3.01; 3.00, the average texture scores of treatments T0, T1 and T2 are 2.88; 2.83; 2.20 and the average aroma score of the treatments T0, T1 and T2 are 4.00; 3.69; and 3.64. The conclusion of the research are the use of Sargassum sp. up to 8% can reduce the level of pellet hardness, the value of pellet durability is good, the color is blackish brown, the texture of the pellet is getting rough and the aroma of pellet is rather fishy.