Along with the times utilization of natural fibers composite materials has been developed. The purpose of this research was to know the impact strength of pineapple leaves fiber composites before applied to basic material for Indonesia National Standard (SNI) helmet. Design of this research was true experimental with posttest-only control design, in this research there were two group, namely experimental group (fiber composite) and control group (SNI helmet). Result of this research showed there was improvement about composite strength with addition fibers volume. The value of absorbed energy and the highest impact strength is found in 10% of fiber volume equals 0.5375 Joules and 0.01657/mm 2 , far above the SNI helmet which only amounted to 0.3125 Joules and 0.00972 J/mm 2 . For the highest density value is found in 13% of fiber volume equals 1.4525 g/cm 3 . It can be concluded that pineapple leaves fiber composites can be used as an alternative material for making SNI helmet.