The present invention relates to a bicycle with an electric power for the utilization of electrical equipment, of the front and rear wheel of a bicycle is provided in any one of the wheel side portions and the output to the running former bicycle, by selecting one of the low mode bike traveling and development unit of a pair of generating the power of applying or interrupting the power generation section power generated during a bicycle traveling and going in while installed in the wheel support frame pivoted to combine the development of the hinge portion is provided on the upper side of the government and the skeleton frame and the secondary battery to stably charged with the electric power generated in the power generation section, while mounted in the vicinity of the handle using the power supplied from the auxiliary battery relieving the battery usage of portable devices including mobile phones, that secure mounting of the portable device holder and, the handle and the saddle inlets near to or attached to the vicinity of any of these vicinity, including the black box to store to notice the front and rear conditions and monitor and record it using electric power supplied from the secondary battery, the driver before the bicycle driving of may determine the output intensity mode for simple operation power only, and identify the amount of charge or the rate of the secondary battery in the course of driving, electricity for the use of electrical equipment that can be applied or cut off the electric power of the generator with minimum effort the driver provide bicycles with development.