An experiment was conducted to determine the effects of mixing ratio of rice straw(R), apple pomace(A), sesame oil meal(S) and cage layer excreta(C) on feed quality of rice straw silage. Various mixing ratios of the ingedients into silage were used in this study. There were 3 RA silages with mixing ratios of R and A; RA1 of 50 and 50?g RA2 of 40 and 60%, RA3 of 30 and 70%, respectively. The RAS silages 1 through 9 contained R, A and S with mixing ratios of 50+50+10, 50+50+15, 50+50+20, 60+40+10, 60+40+15, 60+40+20, 70+ 30+10, 70+30+15 and 70+30+20, respectively. On the other hand, the RAC silages 1 through 9 consisted of R, A and C with the mixing ratios of 50+50+10, 50+50+20, 50+50+30, 60+40+10, 60+40+20, 60+40+ 30, 70+30+10, 70+30+20 and 70+30+30. The average crude protein and crude fat contents of RAS silage were higher than the other ones(P$lt;0.01). Especially, crude protein content of RAS silages 3 was the highest (14.26%). The crude protein and crude fat contents of RAS silages increased by the addition of sesame oil meal. Crude fiber content was the highest at RA silage 3 (30.14%), but RAC silage 9 was the lowest (20.99%). Crude ash content was the highest at RAC silage 9 (17.72%), but RA silage 1 was the lowest (5.68%). The average NDF, ADF and cellulose contents of RA silages were higher than those of RAS and RAC silages. the average hemicellulose content was the lowest at RAC silage(P$lt;0.01), but its ligin content was the highest. The average pH value of silage was high in the order of RAC $gt; RAS $gt; RA. Acetic acid was high in the order of RAS $gt; RA $gt; RAC. Propionic acid was not detected at RA and RAS silages, but was at the RAC silages. Especially, the 7 and 8 silages of RAS were higher than the others. Lactic acid was high in the order of RAC $gt; RA $gt; RAS. Especially, RAC silage 9 was the highest (6.318%), but RAS silage 4 was the lowest (0.357%).