A laundry treatment apparatus comprising: a cabinet forming an appearance of the apparatus; a drum rotatably disposed in the cabinet; a housing fixed to the drum; an accommodation space defined within the housing forming a closed loop; a balancing unit movably disposed in the accommodation space; and a housing power line provided at an inner circumferential surface of the housing to supply power to the balancing unit, wherein the balancing unit comprises: a unit body; a motor for moving the unit body; a brush contacting the housing power line; characterized in that the balancing unit further comprises a power terminal housing fixed to the unit body and having a space in which the brush is removably installed, wherein the brush comprises: a first leg having a free end and a fixed end, the fixed end of the first leg being removably fitted to the power terminal housing; a second leg having a free end and a fixed end, the fixed end of the second leg being removably fitted to the power terminal housing; a first curved portion provided on the free end of the first leg to contact with the housing power line; a third curved portion provided on the free end of the second leg to contact with the housing power line; and a second curved portion connecting the first curved portion and the third curved portion without contacting the housing power line, wherein fixing hooks (731, 732) are provided in the fixed end of the first leg and the fixed end of the second leg, respectively, and the fixing hook of the first leg is removably fitted into one of sockets (811, 812) at the power terminal housing, and the fixing hook of the second leg is removably fitted into another one of the sockets (811, 812) at the power terminal housing. a cabinet forming an appearance of the apparatus; a drum rotatably disposed in the cabinet; a housing fixed to the drum; an accommodation space defined within the housing forming a closed loop; a balancing unit movably disposed in the accommodation space; and a housing power line provided at an inner circumferential surface of the housing to supply power to the balancing unit, wherein the balancing unit comprises: a unit body; a motor for moving the unit body; a brush contacting the housing power line; characterized in that the balancing unit further comprises a power terminal housing fixed to the unit body and having a space in which the brush is removably installed, wherein the brush comprises: a first leg having a free end and a fixed end, the fixed end of the first leg being removably fitted to the power terminal housing; a second leg having a free end and a fixed end, the fixed end of the second leg being removably fitted to the power terminal housing; a first curved portion provided on the free end of the first leg to contact with the housing power line; a third curved portion provided on the free end of the second leg to contact with the housing power line; and a second curved portion connecting the first curved portion and the third curved portion without contacting the housing power line, wherein fixing hooks (731, 732) are provided in the fixed end of the first leg and the fixed end of the second leg, respectively, and the fixing hook of the first leg is removably fitted into one of sockets (811, 812) at the power terminal housing, and the fixing hook of the second leg is removably fitted into another one of the sockets (811, 812) at the power terminal housing. a unit body; a motor for moving the unit body; a brush contacting the housing power line; characterized in that the balancing unit further comprises a power terminal housing fixed to the unit body and having a space in which the brush is removably installed, wherein the brush comprises: a first leg having a free end and a fixed end, the fixed end of the first leg being removably fitted to the power terminal housing; a second leg having a free end and a fixed end, the fixed end of the second leg being removably fitted to the power terminal housing; a first curved portion provided on the free end of the first leg to contact with the housing power line; a third curved portion provided on the free end of the second leg to contact with the housing power line; and a second curved portion connecting the first curved portion and the third curved portion without contacting the housing power line, wherein fixing hooks (731, 732) are provided in the fixed end of the first leg and the fixed end of the second leg, respectively, and the fixing hook of the first leg is removably fitted into one of sockets (811, 812) at the power terminal housing, and the fixing hook of the second leg is removably fitted into another one of the sockets (811, 812) at the power terminal housing. a first leg having a free end and a fixed end, the fixed end of the first leg being removably fitted to the power terminal housing; a second leg having a free end and a fixed end, the fixed end of the second leg being removably fitted to the power terminal housing; a first curved portion provided on the free end of the first leg to contact with the housing power line; a third curved portion provided on the free end of the second leg to contact with the housing power line; and a second curved portion connecting the first curved portion and the third curved portion without contacting the housing power line, wherein fixing hooks (731, 732) are provided in the fixed end of the first leg and the fixed end of the second leg, respectively, and the fixing hook of the first leg is removably fitted into one of sockets (811, 812) at the power terminal housing, and the fixing hook of the second leg is removably fitted into another one of the sockets (811, 812) at the power terminal housing.