An electric bicycle comprising: a battery; a generator to generate voltage by operation of pedals; and a pedal load adjustment unit to adjust pedal load applied to the pedals by controlling voltage generated from the generator and used to charge the battery, wherein the pedal load adjustment unit includes plural capacitors (C1, C2, C3) configured to be charged with the voltage generated from the generator and plural switches (S1, S2, S3) configured to operate alternately so that the voltage generated from the generator is discharged to the capacitors (C1, C2, C3) to charge the capacitors (C1, C2, C3) and the voltage stored in the capacitors (C1, C2, C3) is discharged to the battery to charge the battery, wherein the pedal load adjustment unit includes: a rectifier to rectify AC voltage generated from the generator to DC voltage; characterized in that a first switch being interposed between an output terminal of the rectifier and an input terminal of the battery; a second switch being interposed between an output terminal of the first switch and an input terminal of the battery; a first capacitor being interposed between a junction point of an output terminal of the rectifier and an input terminal of the first switch and the ground; a second capacitor being interposed between a junction point of an output terminal of the first switch and an input terminal of the second switch and the ground; and a third capacitor being interposed between a junction point of an output terminal of the second switch and an input terminal of the battery and the ground. a battery; a generator to generate voltage by operation of pedals; and a pedal load adjustment unit to adjust pedal load applied to the pedals by controlling voltage generated from the generator and used to charge the battery, wherein the pedal load adjustment unit includes plural capacitors (C1, C2, C3) configured to be charged with the voltage generated from the generator and plural switches (S1, S2, S3) configured to operate alternately so that the voltage generated from the generator is discharged to the capacitors (C1, C2, C3) to charge the capacitors (C1, C2, C3) and the voltage stored in the capacitors (C1, C2, C3) is discharged to the battery to charge the battery, wherein the pedal load adjustment unit includes: a rectifier to rectify AC voltage generated from the generator to DC voltage; characterized in that a first switch being interposed between an output terminal of the rectifier and an input terminal of the battery; a second switch being interposed between an output terminal of the first switch and an input terminal of the battery; a first capacitor being interposed between a junction point of an output terminal of the rectifier and an input terminal of the first switch and the ground; a second capacitor being interposed between a junction point of an output terminal of the first switch and an input terminal of the second switch and the ground; and a third capacitor being interposed between a junction point of an output terminal of the second switch and an input terminal of the battery and the ground. a rectifier to rectify AC voltage generated from the generator to DC voltage; characterized in that a first switch being interposed between an output terminal of the rectifier and an input terminal of the battery; a second switch being interposed between an output terminal of the first switch and an input terminal of the battery; a first capacitor being interposed between a junction point of an output terminal of the rectifier and an input terminal of the first switch and the ground; a second capacitor being interposed between a junction point of an output terminal of the first switch and an input terminal of the second switch and the ground; and a third capacitor being interposed between a junction point of an output terminal of the second switch and an input terminal of the battery and the ground.