Surimi gel strengthening agent could be extracted from coconut husk using 60 or 80% ethanol. Addition of coconut husk extract yielded the surimi gel from sardine with the increased breaking force, textural and sensory characteristics. However, the addition of E60 or E80 caused a slight decrease in whiteness, particularly with increasing concentration. Therefore, the extract from coconut husk could be used as a natural additive to improve the gel properties of surimi manufactured from dark-fleshed fish.