A cooking apparatus is provided that has an oven cooker and a cook-top cooker. Heat is radiated through a ventilation structure formed by an air inflow duct and an air discharge duct. Additionally, the air inflow duct and the air discharge duct may be stacked one on top of the other, and provided between the oven cooker and the cook-top cooker. Further, the air discharge duct is configured to communicate with an outside, e.g., via a blowing fan unit and an air guide. Further, a cooling capacity can be greatly improved by performing an optimal compulsory cooling according to an operation mode.