Provided is a dual-slot die coater which can easily adjust a coating gap and can control the deviation of the coating gap in the width direction. The dual-slot die coater of the present invention, which has a first slot and a second slot for discharging a coating solution in the opposite direction to the direction of gravity, comprises: a first die block vertically provided on the rear portion of the top surface of a base; a second die block disposed in front of the first die block to form the first slot between the first die block and the second die block; and a third die block disposed in front of the second die block to form the second slot between the second die block and the third die block, wherein the dual-slot die coater further comprises an alignment block provided between the front portion of the top surface of the base and the bottom surface of the second die block and fastened to the bottom surface of the second die block and the bottom surface of the first die block by bolts to couple same to each other.