A cooking appliance comprising a cabinet defining an external appearance of the cooking appliance, a top plate disposed at a top of the cabinet , the top plate being provided with a first cooking unit for performing cooking using a heat source, and a second cooking unit provided in the cabinet for performing cooking using a heat source, the cooking appliance further comprising: a control panel disposed at a front of the cabinet , the control panel being provided therein with at least one air introduction hole ; a controller (C) disposed at a rear of the control panel for controlling the first cooking unit and the second cooking unit ; a first guide member disposed in the control panel for guiding external air introduced through the at least one air introduction hole to a rear of the cooking appliance , wherein the controller (C) is disposed in front of the first guide member in the control panel ; and a heat dissipation fan disposed between the control panel and a rear wall of the cabinet , wherein a direction in which external air is introduced into the cooking appliance through the at least one air introduction hole is different from a direction in which the external air is discharged from the cooking appliance , characterized in that the first guide member comprises: two horizontal parts extending in a width direction; two vertical parts extending downward from respective facing ends of the two horizontal parts ; and a blocking part disposed between the two vertical parts for covering at least a portion of a rear end of each of the two vertical parts ; the controller (C) is disposed between the two vertical parts ; a first horizontal flow channel is defined between the two horizontal parts and an upper wall of the control panel ; a first vertical flow channel is defined between the two vertical parts , the controller (C) being disposed in the first vertical flow channel ; and the external air introduced through the at least one air introduction hole is introduced into the first vertical flow channel via the first horizontal flow channel . a control panel disposed at a front of the cabinet , the control panel being provided therein with at least one air introduction hole ; a controller (C) disposed at a rear of the control panel for controlling the first cooking unit and the second cooking unit ; a first guide member disposed in the control panel for guiding external air introduced through the at least one air introduction hole to a rear of the cooking appliance , wherein the controller (C) is disposed in front of the first guide member in the control panel ; and a heat dissipation fan disposed between the control panel and a rear wall of the cabinet , wherein a direction in which external air is introduced into the cooking appliance through the at least one air introduction hole is different from a direction in which the external air is discharged from the cooking appliance , characterized in that the first guide member comprises: two horizontal parts extending in a width direction; two vertical parts extending downward from respective facing ends of the two horizontal parts ; and a blocking part disposed between the two vertical parts for covering at least a portion of a rear end of each of the two vertical parts ; the controller (C) is disposed between the two vertical parts ; a first horizontal flow channel is defined between the two horizontal parts and an upper wall of the control panel ; a first vertical flow channel is defined between the two vertical parts , the controller (C) being disposed in the first vertical flow channel ; and the external air introduced through the at least one air introduction hole is introduced into the first vertical flow channel via the first horizontal flow channel . <EOS>