A suitcase with charging function, comprising: a suitcase body; rollers disposed at the bottom of the suitcase body; current generating devices disposed on rollers; a PCB, connected to the current generating device; a rechargeable battery, connected to PCB. Wherein the current generating device comprises: a roller bracket, fixed to the bottom of the suitcase body and connected to the roller through a roller shaft; a power generator fixing plate, fixed on the roller bracket and having a generator PCB and power lines; a power generator, fixed on the power generator fixing plate and connected to the generator PCB. There is a first gear on the roller connected to the roller shaft, and a second gear on the shaft of the power generator, and the second gear is engaged with the first gear directly or through transmission gears. The rechargeable battery has a built-in circuit board and at least one output port.