Cellulose is a chemical component of lignocellulose that can be found in most cell walls and woody parts of plants. One of the plants that has a high cellulose content is coco fiber, which is 43.44%. However, the potential of cellulose content in coco fiber is still not optimally utilized. This study aims to determine the effect of the temperature and time of the bleaching process using peracetic acid (PA) on the characteristics of the cellulose produced, as well as to determine the best combination of temperature and time for the bleaching process with PA to produce coco fiber cellulose. This study used a randomized block design with two factors, that were temperature (60°C, 80°C, and 100°C) and time (30 minutes and 60 minutes). Data were analyzed by analysis of variance and continued with Duncan's multiple comparison test. Variables observed were yield, degree of whiteness, content of cellulose, hemicellulose, and lignin. The results showed that the treatment temperature and time of the bleaching process using PA had a significant effect on all observed variables. The interaction between temperature and time of the bleaching process had a significant effect on whiteness, cellulose, hemicellulose, and lignin content, but did not significantly affect the yield content of coco fiber. The best treatment to produce cellulose was obtained by using PA at a temperature of 100°C and a time of 60 minutes. The characteristics were 35.38±0.32% yield, 84.77±0.81% degree of whiteness, 83.14±0.22% cellulose, 6.60±0.51% hemicellulose, and 4.23±0.55% lignin.