A washing machine comprising: a first housing including an opening formed therein and filled with liquid carbon dioxide and gaseous carbon dioxide at a higher pressure than atmospheric pressure; a drum for accommodating laundry inside, and rotatably provided in the inside of the first housing so that the laundry and the carbon dioxide are mixed together; a barrier configured to seal the opening and coupled to the first housing , wherein the barrier includes a first through-hole and a second through-hole ; a second housing configured to seal one surface of the barrier and coupled to the first housing ; and a motor assembly disposed in the second housing , and coupled to the barrier , wherein the motor assembly includes: a stator , a rotor , and a bearing housing , a rotary shaft disposed in the bearing housing , the rotary shaft having one end of which is coupled to the rotor , and the other end of which is coupled to the drum passing through the barrier ; a first sealing part and a second sealing part that are disposed in the bearing housing and coupled to the rotary shaft at position spaced apart from each other, and a first bearing and a second bearing for rotatably supporting the rotary shaft are disposed between the first sealing part and the second sealing part , wherein the rotary shaft passes through the first through-hole , and gaseous carbon dioxide flows between the first housing and the second housing via the second through-hole . a first housing including an opening formed therein and filled with liquid carbon dioxide and gaseous carbon dioxide at a higher pressure than atmospheric pressure; a drum for accommodating laundry inside, and rotatably provided in the inside of the first housing so that the laundry and the carbon dioxide are mixed together; a barrier configured to seal the opening and coupled to the first housing , wherein the barrier includes a first through-hole and a second through-hole ; a second housing configured to seal one surface of the barrier and coupled to the first housing ; and a motor assembly disposed in the second housing , and coupled to the barrier , wherein the motor assembly includes: a stator , a rotor , and a bearing housing , a rotary shaft disposed in the bearing housing , the rotary shaft having one end of which is coupled to the rotor , and the other end of which is coupled to the drum passing through the barrier ; a first sealing part and a second sealing part that are disposed in the bearing housing and coupled to the rotary shaft at position spaced apart from each other, and a first bearing and a second bearing for rotatably supporting the rotary shaft are disposed between the first sealing part and the second sealing part , wherein the rotary shaft passes through the first through-hole , and gaseous carbon dioxide flows between the first housing and the second housing via the second through-hole . a rotary shaft disposed in the bearing housing , the rotary shaft having one end of which is coupled to the rotor , and the other end of which is coupled to the drum passing through the barrier ; a first sealing part and a second sealing part that are disposed in the bearing housing and coupled to the rotary shaft at position spaced apart from each other, and a first bearing and a second bearing for rotatably supporting the rotary shaft are disposed between the first sealing part and the second sealing part , wherein the rotary shaft passes through the first through-hole , and gaseous carbon dioxide flows between the first housing and the second housing via the second through-hole . <EOS>