A clothes treatment apparatus comprising: a cabinet partitioned into a treatment chamber for allowing clothes to be hung therein, and a cycle chamber for allowing machinery to be installed therein; a door for opening and closing the cabinet ; wherein a tank module frame is located below the treatment chamber , wherein the tank module frame is disposed between the cycle chamber and the door , wherein the tank module frame comprises a tank installation space to allow a water supply tank and a drainage tank to be installed therein, wherein the tank module frame is arranged to partition the tank installation space from the cycle chamber , a steam unit disposed in the cycle chamber for supplying steam into the treatment chamber ; a heat pump unit disposed in the cycle chamber for circulating air in the treatment chamber and conditioning the air that is circulated; wherein the water supply tank is separably installed in the tank module frame and is connected to the steam unit , configured to supply water to the steam unit , wherein the drainage tank is separably installed in the tank module frame , configured to store condensed water generated in at least one selected from between the treatment chamber and the heat pump unit , and wherein each of the water supply tank and the drainage tank comprises: a tank body open at a front thereof and the upper side of the tank body being round; a tank cover coupled to the front of the tank body to define a water-storing space; and a grip disposed at an upper side of a front side of the water supply tank and concaved from each front of the water supply tank and the drainage tank to a rear of the water supply tank and the drainage tank , wherein the tank cover and the grip are exposed to a user when the door is open, and each of the water supply tank and the drainage tank is separated from or installed in the tank module frame by a user. a cabinet partitioned into a treatment chamber for allowing clothes to be hung therein, and a cycle chamber for allowing machinery to be installed therein; a door for opening and closing the cabinet ; wherein a tank module frame is located below the treatment chamber , wherein the tank module frame is disposed between the cycle chamber and the door , wherein the tank module frame comprises a tank installation space to allow a water supply tank and a drainage tank to be installed therein, wherein the tank module frame is arranged to partition the tank installation space from the cycle chamber , a steam unit disposed in the cycle chamber for supplying steam into the treatment chamber ; a heat pump unit disposed in the cycle chamber for circulating air in the treatment chamber and conditioning the air that is circulated; wherein the water supply tank is separably installed in the tank module frame and is connected to the steam unit , configured to supply water to the steam unit , wherein the drainage tank is separably installed in the tank module frame , configured to store condensed water generated in at least one selected from between the treatment chamber and the heat pump unit , and wherein each of the water supply tank and the drainage tank comprises: a tank body open at a front thereof and the upper side of the tank body being round; a tank cover coupled to the front of the tank body to define a water-storing space; and a grip disposed at an upper side of a front side of the water supply tank and concaved from each front of the water supply tank and the drainage tank to a rear of the water supply tank and the drainage tank , a tank body open at a front thereof and the upper side of the tank body being round; a tank cover coupled to the front of the tank body to define a water-storing space; and a grip disposed at an upper side of a front side of the water supply tank and concaved from each front of the water supply tank and the drainage tank to a rear of the water supply tank and the drainage tank , <EOS>