The influence of different environmental aging on mode I and mode II interlaminar fracturernresistance of glass fiber reinforced polymer composite material is experimentally studied in thisrnpaper. Test specimens of unidirectional E-glass fiber with epoxy resin as a matrix material arernused in this study. The manufacturing techniques include hand layup process that assisted withrnvacuum bagging system. Double cantilever beam (DCB) specimens for mode I and end-notchedrnflexure (ENF) specimens for mode II loading conditions are used to realize the test. Thesernspecimens were categorized to be immersed in pure water, saline water, engine oil and benzenernenvironments for different period of time to visualize the effects. Through this comparison, thernmode I interlaminar resistance ï¿½ï¿½ï¿½ï¿½ = 50.8 ï¿½ï¿½/ï¿½ï¿½rn, which is the maximum one, is resulted in thernnormal specimen test. The other fracture resistance, which is decreased by 10.27% from thernnormal condition specimen, is observed in 15rn2rn day engine oil immersion. On the other hand, inrnmode II fracture resistance the maximum value of ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ = 2.49 ï¿½ï¿½/ï¿½ï¿½rnthrn is obtained in specimensrnimmersed for 30rn2rn was seenrnin specimens tested from 15rnthrn day in benzene media. The other proportionate result ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ = 2.29 ï¿½ï¿½/ï¿½ï¿½rn2rn day pure water media. While in the normal condition specimens, thernfracture resistance obtained is ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ = 1.58 ï¿½ï¿½/ï¿½ï¿½rnthrn. The result of the experimental work showed that,rnthe resistance to fracture of environmentally exposed specimens are lower compared to the normalrnspecimens in a DCB test. This can be interpreted as the distribution of such environments on thernexposed specimens facilitates the dislocation of the mating matrix and hence increases the openingrnof the laminate. While, in the mode II loading condition, the exposed specimens are in goodrnperformance of resistance to delamination compared to the normal. Again, this is the reasonrnbehind the absorbed particles help to increase the flexural strength of the immersed specimens.