A press die comprising: a lower die; and an upper die disposed on an upper side of the lower die, the lower die comprising a lower base resting on a stationary surface, a lower core on which a plate is loaded, the lower core having a lower surface forming portion corresponding to a lower surface of a product to be manufactured and a side surface forming portion corresponding to a side surface of the product to be manufactured, the upper die comprising an upper base, an upper core which comprises an upper surface forming portion corresponding to an upper surface of the product to be manufactured and is vertically movably installed to the upper base, characterized by the lower die further comprising a pair of guide blocks to guide a cylindrical bending shaft, each of the guide blocks comprising the side surface forming portion and a guide groove having a shape corresponding to a guide portion, and by the upper die further comprising a pair of moving blocks which is horizontally movably installed to the upper base, the cylindrical bending shaft both end portions of which are rotatably installed to the pair of moving blocks, the cylindrical bending shaft pressing a portion of the plate against the side surface forming portion as the moving blocks move in a first horizontal direction, and by at least one elastic support unit to elastically support each of the pair of moving blocks in the first horizontal direction, wherein the upper core further comprises the guide portion which forms a side surface thereof and guides the bending shaft such that the bending shaft moves in a second horizontal direction opposite to the first horizontal direction. a lower die; and an upper die disposed on an upper side of the lower die, the lower die comprising a lower base resting on a stationary surface, a lower core on which a plate is loaded, the lower core having a lower surface forming portion corresponding to a lower surface of a product to be manufactured and a side surface forming portion corresponding to a side surface of the product to be manufactured, the upper die comprising an upper base, an upper core which comprises an upper surface forming portion corresponding to an upper surface of the product to be manufactured and is vertically movably installed to the upper base, characterized by the lower die further comprising a pair of guide blocks to guide a cylindrical bending shaft, each of the guide blocks comprising the side surface forming portion and a guide groove having a shape corresponding to a guide portion, and by the upper die further comprising a pair of moving blocks which is horizontally movably installed to the upper base, the cylindrical bending shaft both end portions of which are rotatably installed to the pair of moving blocks, the cylindrical bending shaft pressing a portion of the plate against the side surface forming portion as the moving blocks move in a first horizontal direction, and by at least one elastic support unit to elastically support each of the pair of moving blocks in the first horizontal direction, a lower base resting on a stationary surface, a lower core on which a plate is loaded, the lower core having a lower surface forming portion corresponding to a lower surface of a product to be manufactured and a side surface forming portion corresponding to a side surface of the product to be manufactured, the upper die comprising an upper base, an upper core which comprises an upper surface forming portion corresponding to an upper surface of the product to be manufactured and is vertically movably installed to the upper base, characterized by the lower die further comprising a pair of guide blocks to guide a cylindrical bending shaft, each of the guide blocks comprising the side surface forming portion and a guide groove having a shape corresponding to a guide portion, and by the upper die further comprising a pair of moving blocks which is horizontally movably installed to the upper base, the cylindrical bending shaft both end portions of which are rotatably installed to the pair of moving blocks, the cylindrical bending shaft pressing a portion of the plate against the side surface forming portion as the moving blocks move in a first horizontal direction, and by at least one elastic support unit to elastically support each of the pair of moving blocks in the first horizontal direction,