A flexible paper fiber-reduced graphene oxide-polyaniline hybrid electrode was investigated in this article. Using low-cost paper fiber as flexible substrate, the electrode was prepared through ultrasonic dispersion and vacuum filtration. It combined the advantages of graphene oxide electric double layer with polyaniline conductive polymer pseudo-capacitance. The obtained electrode was characterized and tested by various instrumentations such as scanning electron microscope, cyclic voltammetry and galvanostatic chargedischarge. In the bending test experiments, the obtained electrode was not separated into individual layers after hundreds of bending cycles. The flexible paper fiber-reduced graphene oxide-polyaniline hybrid electrode also exhibits excellent capacitance (458 F/g at a discharge current density of 1 A/g and 250 F/g at a discharge current density of 10 A/g) and remarkable cycling stability with capacitance degradation about 20% after 1 000 charge-discharge cycles at a current density of 3 A/g. The proposed flexible electrode has great potentials in the development of flexible energy-storage devices for wearable electronic products.