Cyclic fatigue crack growth and fracture behavior in a chopped-mat E-glass-fiber-reinforced hybrid resin composite knitted with continuous poly(ethylene terephthalate) (PET) fibers is investigated. Fatigue experiments are conducted on notched composite specimens cycled under tensile loading. The fatigue crack growth in the composite is found to exhibit an unusual, recurring crack acceleration-retardation-deceleration process, owing to the complex reinforcement configurations and material systems. The various crack-growth mechanisms involved in the composite fatigue are studied using SEM observations.