A washing machine comprising: a main body; a tub provided in the main body; a pump provided to circulate wash water into the tub; a circulation bubble unit (100, 100A) provided on a flowing route of the wash water flowing out from the pump to the tub; wherein the circulation bubble unit (100, 100A) comprises, a case (110, 110A) to form an exterior and having a fluid path (200, 200A) formed therein to receive the wash water from the pump; a first fluid path pipe (120, 120A) formed to be branched from the fluid path (200, 200A) of the case (110, 110A) and configured to form a first fluid path provided so that part of the wash water flowing out from the pump is circulated into the tub; a second fluid path pipe (122, 122A) integrally formed at an upper side of the case provided to be in communication with the fluid path (200, 200A) and the tub, and configured to form a second fluid path provided to generate bubbles in the wash water using another part of the wash water; an air introducing part (130, 130A) to introduce air into the second fluid path pipe (122, 122A) to generate wash water having bubbles; and an electromagnetic control valve (400, 402) to open and close the air introducing part (130, 130A) through a separate controller, wherein when the electromagnetic control valve (400, 402) is closed only wash water without bubbles is supplied to the tub via both the first fluid path pipe (120, 120A) and second fluid path pipe (122, 122A) to perform only a circulation function, and wherein when the electromagnetic control valve (400, 402) is open wash water without bubbles is supplied to the tub via the first fluid path pipe (120, 120A) and wash water with bubbles is supplied to the tub via the second fluid path pipe (122, 122A) to perform both of the circulation function and a bubble function simultaneously. a main body; a tub provided in the main body; a pump provided to circulate wash water into the tub; a circulation bubble unit (100, 100A) provided on a flowing route of the wash water flowing out from the pump to the tub; wherein the circulation bubble unit (100, 100A) comprises, a case (110, 110A) to form an exterior and having a fluid path (200, 200A) formed therein to receive the wash water from the pump; a first fluid path pipe (120, 120A) formed to be branched from the fluid path (200, 200A) of the case (110, 110A) and configured to form a first fluid path provided so that part of the wash water flowing out from the pump is circulated into the tub; a second fluid path pipe (122, 122A) integrally formed at an upper side of the case provided to be in communication with the fluid path (200, 200A) and the tub, and configured to form a second fluid path provided to generate bubbles in the wash water using another part of the wash water; an air introducing part (130, 130A) to introduce air into the second fluid path pipe (122, 122A) to generate wash water having bubbles; and an electromagnetic control valve (400, 402) to open and close the air introducing part (130, 130A) through a separate controller, wherein when the electromagnetic control valve (400, 402) is closed only wash water without bubbles is supplied to the tub via both the first fluid path pipe (120, 120A) and second fluid path pipe (122, 122A) to perform only a circulation function, and wherein when the electromagnetic control valve (400, 402) is open wash water without bubbles is supplied to the tub via the first fluid path pipe (120, 120A) and wash water with bubbles is supplied to the tub via the second fluid path pipe (122, 122A) to perform both of the circulation function and a bubble function simultaneously.