Provided is a high-voltage battery with an integrated connector. The high-voltage battery includes cells, support members, a housing, the integrated connector and a BMS. A lower connection member is provided on one side of each support member and has protrusions made of electrical conductors. The protrusions come into contact with corresponding electrodes of the cells. A cell assembly formed by the arrangement of the cells and the supports is inserted into the housing. The integrated connector is connected to the lower connection members of the support members so as to mechanically and electrically connect the cells to each other.