The effects of pre-cure conditions on mechanical and thermal properties of diglycidyl ether of bisphenol A(DGEBA)/4,4'-methylene dianiline(MDA)/glutaronitrile(GN) system were investigated. Glass transition temperature(T_g) increased a little and decomposition temperature(T_d) was almost constant with the increment of pre-cure time. Impact strength exhibited the highest value at pre-cure time of 1.0 hr and was constant as pre-cure time increased over 1.0 hr.