A cooking appliance comprising: a casing having a cavity (S1) and an upper space (S2) divided from the cavity (S1), therein; a door disposed at front of the casing and configured to open and close the cavity (S1); a panel unit disposed at front of the casing at a height different from a height of the door , and movable from a first position to a second position; and a hinge module connecting the casing and the panel unit to each other, the hinge module is disposed in the upper space (S2), wherein the hinge module comprises: a hinge housing disposed in the upper space (S2); and a driving arm protruding forwards from the upper space (S2) and connected to the panel unit , the driving arm having a first end connected to the hinge housing , and a second end protruding forwards from the upper space (S2) of the cavity (S1) to be rotatably connected to the panel unit , wherein the driving arm is connected to a plurality of hinge coupled portions provided in the panel unit ; wherein the driving arm comprises: a first driving arm having a first end rotatably connected to the hinge housing ; and a second driving arm configured to be operated in conjunction with the first driving arm , and having a first end rotatably connected to the hinge housing ; wherein both a second end of the first driving arm and a second end of the second driving arm are connected to the panel unit ; and wherein in an opening process of the panel unit , the second driving arm is stored in the first driving arm , and the first driving arm and the second driving arm are overlapped with each other. a casing having a cavity (S1) and an upper space (S2) divided from the cavity (S1), therein; a door disposed at front of the casing and configured to open and close the cavity (S1); a panel unit disposed at front of the casing at a height different from a height of the door , and movable from a first position to a second position; and a hinge module connecting the casing and the panel unit to each other, the hinge module is disposed in the upper space (S2), wherein the hinge module comprises: a hinge housing disposed in the upper space (S2); and a driving arm protruding forwards from the upper space (S2) and connected to the panel unit , the driving arm having a first end connected to the hinge housing , and a second end protruding forwards from the upper space (S2) of the cavity (S1) to be rotatably connected to the panel unit , wherein the driving arm is connected to a plurality of hinge coupled portions provided in the panel unit ; a hinge housing disposed in the upper space (S2); and a driving arm protruding forwards from the upper space (S2) and connected to the panel unit , the driving arm having a first end connected to the hinge housing , and a second end protruding forwards from the upper space (S2) of the cavity (S1) to be rotatably connected to the panel unit , wherein the driving arm is connected to a plurality of hinge coupled portions provided in the panel unit ; a first driving arm having a first end rotatably connected to the hinge housing ; and a second driving arm configured to be operated in conjunction with the first driving arm , and having a first end rotatably connected to the hinge housing ; wherein both a second end of the first driving arm and a second end of the second driving arm are connected to the panel unit ; and wherein in an opening process of the panel unit , the second driving arm is stored in the first driving arm , and the first driving arm and the second driving arm are overlapped with each other. <EOS>